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Sanchez-Lopez J, Cardobi N, Parisi G, Savazzi S, Marzi CA. Role of corpus callosum in unconscious vision. Neuropsychologia 2024; 196:108839. [PMID: 38401630 DOI: 10.1016/j.neuropsychologia.2024.108839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 02/01/2024] [Accepted: 02/21/2024] [Indexed: 02/26/2024]
Abstract
The existence of unconscious visually triggered behavior in patients with cortical blindness (e.g., homonymous hemianopia) has been amply demonstrated and the neural bases of this phenomenon have been thoroughly studied. However, a crosstalk between the two hemispheres as a possible mechanism of unconscious or partially conscious vision has not been so far considered. Thus, the aim of this study was to assess the relationship between structural and functional properties of the corpus callosum (CC), as shown by probabilistic tractography (PT), behavioral detection/discrimination performance and level of perceptual awareness in the blind field of patients with hemianopia. Twelve patients were tested in two tasks with black-and-white visual square-wave gratings, one task of movement and the other of orientation. The stimuli were lateralized to one hemifield either intact or blind. A PT analysis was carried out on MRI data to extract fiber properties along the CC (genu, body, and splenium). Compared with a control group of participants without brain damage, patients showed lower FA values in all three CC sections studied. For the intact hemifield we found a significant correlation between PT values and visual detection/discrimination accuracy. For the blind hemifield the level of perceptual awareness correlated with PT values for all three CC sections in the movement task. Importantly, significant differences in all three CC sections were found also between patients with above-vs. chance detection/discrimination performance while differences in the genu were found between patients with and without perceptual awareness. Overall, our study provides evidence that the properties of CC fibers are related to the presence of unconscious stimulus detection/discrimination and to hints of perceptual awareness for stimulus presentation to the blind hemifield. These results underline the importance of information exchange between the damaged and the healthy hemisphere for possible partial or full recovery from hemianopia.
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Affiliation(s)
- Javier Sanchez-Lopez
- Escuela Nacional de Estudios Superiores Unidad Juriquilla, Universidad Nacional Autonoma de Mexico, Queretaro, Mexico; Department of Neuroscience, Biomedicine and Movement, University of Verona, Italy.
| | - Nicolo Cardobi
- Azienda Ospedaliera Universitaria Integrata Verona, Italy.
| | - Giorgia Parisi
- Department of Neuroscience, Biomedicine and Movement, University of Verona, Italy; Perception and Awareness (PandA) Laboratory, Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Italy.
| | - Silvia Savazzi
- Department of Neuroscience, Biomedicine and Movement, University of Verona, Italy; Perception and Awareness (PandA) Laboratory, Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Italy.
| | - Carlo A Marzi
- Department of Neuroscience, Biomedicine and Movement, University of Verona, Italy.
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Wang S, Zhu H, Liu J, Liu H, Gao H. Adult-type neuronal intranuclear inclusion disease with limb tremor onset: a case report. Acta Neurol Belg 2024; 124:751-753. [PMID: 38381308 DOI: 10.1007/s13760-024-02505-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 02/08/2024] [Indexed: 02/22/2024]
Affiliation(s)
- Shuning Wang
- Department of Neurology, Lequn Branch, The First Hospital, Jilin University, No. 3302 Jilin Avenue, Changchun, 130000, Jilin, China
| | - Hui Zhu
- Department of Neurology, Lequn Branch, The First Hospital, Jilin University, No. 3302 Jilin Avenue, Changchun, 130000, Jilin, China.
| | - Jingyao Liu
- Department of Neurology, Lequn Branch, The First Hospital, Jilin University, No. 3302 Jilin Avenue, Changchun, 130000, Jilin, China
| | - Hongping Liu
- Department of Neurology, Lequn Branch, The First Hospital, Jilin University, No. 3302 Jilin Avenue, Changchun, 130000, Jilin, China
| | - Hongyu Gao
- Department of Neurology, Lequn Branch, The First Hospital, Jilin University, No. 3302 Jilin Avenue, Changchun, 130000, Jilin, China
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Kim TK, Kim JW, Kim SK, Lee JY, Kim KH, Phi JH. Surgical treatment of interhemispheric arachnoid cysts. Childs Nerv Syst 2024; 40:1169-1176. [PMID: 38051311 DOI: 10.1007/s00381-023-06243-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 11/28/2023] [Indexed: 12/07/2023]
Abstract
OBJECTIVE In children, interhemispheric arachnoid cysts (IHACs) are rare lesions often associated with corpus callosum dysgenesis. It is still controversial about surgical treatments for IHACs. We aim to report our experience with pediatric IHAC patients and evaluate surgical courses and neurological developments. METHODS Pediatric IHACs treated between 2001 and 2021 were reviewed retrospectively. IHAC was observed until they represented rapid cyst enlargement or neurological symptoms. Cyst fenestration was done by microscope or endoscope, depending on the IHAC's location. Cyst size and corpus callosum dysgenesis were evaluated with neuroimaging. Neurological development was assessed from medical records at the last follow-up. RESULTS Fifteen children received cyst fenestration surgery (mean age 11.4 months). Eleven patients (73.3%) under observation showed rapid cyst enlargement in a short period (median 5 months). Cysto-ventriculostomy (CVS) and cysto-cisternostomy (CCS) regressed the cyst size significantly (p = 0.003). The median follow-up duration was 51 months (range 14-178 months). Corpus callosum dysgenesis was observed in eleven patients (73.3%, complete = 5, partial = 6). Among eight patients (53.3%) having developmental delay, five patients (33.3%) showed speech delay, including one patient with intractable seizures. CONCLUSION Pediatric IHACs frequently present within 1 year after birth, with rapid cyst enlargement. CVS and CCS were effective in regressing the cyst size. Corpus callosum dysgenesis accompanied by IHAC might have a risk of language achievement; however, development delay could rely on multifactorial features, such as epilepsy or other brain anomalies.
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Affiliation(s)
- Tae-Kyun Kim
- Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, 03080, Seoul, Republic of Korea
- Department of Neurosurgery, Nara Medical University, Nara, Japan
| | - Joo Whan Kim
- Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, 03080, Seoul, Republic of Korea
| | - Seung-Ki Kim
- Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, 03080, Seoul, Republic of Korea
| | - Ji Yeoun Lee
- Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, 03080, Seoul, Republic of Korea
| | - Kyung Hyun Kim
- Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, 03080, Seoul, Republic of Korea
| | - Ji Hoon Phi
- Division of Pediatric Neurosurgery, Seoul National University Children's Hospital, Seoul National University College of Medicine, 101 Daehak-Ro, Jongno-Gu, 03080, Seoul, Republic of Korea.
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Li J, Zhang Y, Chen J, Du X, Di Y, Liu Q, Wang C, Zhang Q. Abnormal microstructure of corpus callosum in children with primary nocturnal enuresis: a DTI study. Eur Child Adolesc Psychiatry 2024:10.1007/s00787-024-02416-8. [PMID: 38514474 DOI: 10.1007/s00787-024-02416-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 03/10/2024] [Indexed: 03/23/2024]
Abstract
Primary nocturnal enuresis (PNE) is a common childhood disorder with abnormal sleep or arousal. The corpus callosum (CC) continues to develop into adulthood and plays an important role in sleep arousal. This study aimed to evaluate the microstructure of the CC in children with PNE. Diffusion tensor imaging (DTI) indices were extracted throughout the CC and its seven subregions were compared between the children with PNE and healthy children (HC). The correlation between abnormal DTI indices of the CC and cognitive condition was also tested. Compared to HC, decreased fiber number (NF) (F = 8.492, PFDR = 0.032) and fractional anisotropy (FA) value (F = 8.442, PFDR = 0.040) were found in the posterior midbody of the CC, increased RD was found in the posterior midbody (F = 6.888, PFDR = 0.040) and isthmus (F = 7.967, PFDR = 0.040) in children with PNE. The reduction of FA value was more obvious in boys than girls with PNE. In children with PNE, there was a significant positive correlation between the NF of the posterior midbody and full IQ (r = 0.322, P = 0.025) and between the FA value and the general knowledge memory (r = 0.293, P = 0.043). This study provides imaging evidence for abnormalities in the microstructure of the CC in children with PNE, especially in male PNE, which might affect the children's cognitive performance.
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Affiliation(s)
- Jinqiu Li
- Department of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Yang Zhang
- Department of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Jing Chen
- Department of Radiology, Tianjin Children's Hospital (Children's Hospital of Tianjin University), Tianjin, 300134, China
| | - Xin Du
- Department of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Yaqin Di
- Department of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Qiaohui Liu
- Department of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Chunxiang Wang
- Department of Radiology, Tianjin Children's Hospital (Children's Hospital of Tianjin University), Tianjin, 300134, China.
| | - Quan Zhang
- Department of Medical Imaging and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, 300052, China.
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Cortes-Albornoz MC, Bedoya MA, Choi JJ, Jaimes C. MR insights into fetal brain development: what is normal and what is not. Pediatr Radiol 2024:10.1007/s00247-024-05890-z. [PMID: 38416183 DOI: 10.1007/s00247-024-05890-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 02/09/2024] [Accepted: 02/15/2024] [Indexed: 02/29/2024]
Abstract
Fetal brain development is a complex, rapid, and multi-dimensional process that can be documented with MRI. In the second and third trimesters, there are predictable developmental changes that must be recognized and differentiated from disease. This review delves into the key biological processes that drive fetal brain development, highlights normal developmental anatomy, and provides a framework to identify pathology. We will summarize the development of the cerebral hemispheres, sulci and gyri, extra-axial and ventricular cerebrospinal fluid, and corpus callosum and illustrate the most common abnormal findings in the clinical setting.
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Affiliation(s)
- Maria Camila Cortes-Albornoz
- Department of Radiology, Massachusetts General Hospital, Boston, MA, USA
- Pediatric Imaging Research Center, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - M Alejandra Bedoya
- Department of Radiology, Boston Children's Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Jungwhan John Choi
- Department of Radiology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Camilo Jaimes
- Department of Radiology, Massachusetts General Hospital, Boston, MA, USA.
- Pediatric Imaging Research Center, Massachusetts General Hospital, Boston, MA, USA.
- Harvard Medical School, Boston, MA, USA.
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Kasai S, Watanabe K, Ide S, Ishimoto Y, Sasaki M, Umemura Y, Tatsuo S, Kakeda S, Mikami T, Tamada Y, Miki Y, Wakabayashi K, Tomiyama M, Kakeda S. FLAIR Hyperintensities in the Anterior Part of the Callosal Splenium in the Elderly Population: A Large Cohort Study. Acad Radiol 2024:S1076-6332(24)00072-2. [PMID: 38413313 DOI: 10.1016/j.acra.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 01/24/2024] [Accepted: 02/01/2024] [Indexed: 02/29/2024]
Abstract
RATIONALE AND OBJECTIVES Although hyperintensity in the anterior portion of the callosal splenium on FLAIR (aCS-hyperintensity) is a common finding in elderly adults, no previous studies have examined the clinical significance. In this large elderly population study, we aimed to investigate the associations of aCS-hyperintensity with vascular risk factors, cognitive decline, and other MRI measurements. MATERIALS AND METHODS This cross-sectional study included 2110 participants (median age, 69 years; 61.1% females) who underwent 3 T MRI. The participants were grouped as 215 with mild cognitive impairment (MCI) and 1895 cognitively normal older adults (NOAs). Two neuroradiologists evaluated aCS-hyperintensity by using a four-point scale (none, mild, moderate, and severe). Periventricular hyperintensities (PVHs) were also rated on a four-point scale according to the Fazekas scale. The total intracranial volume (ICV), total brain volume, choroid plexus volume (CPV), and lateral ventricle volume (LVV) were calculated. RESULTS Logistic regression analysis showed diabetes was the main predictor of aCS-hyperintensity after adjusting for potential confounders (age, sex, hypertension, and hyperlipidemia) (p < 0.01), whereas PVH was associated with hypertension (p < 0.01). aCS-hyperintensity rated as "severe" was associated with a presence of MCI (p < 0.01). For the imaging factors, LVV was an independent predictor of aCS-hyperintensity when brain volume and PVH grade were added to the analysis (p < 0.01). CONCLUSION Cerebral small vessel disease due to diabetes is a major contributor to the development of aCS-hyperintensity. Cerebrospinal fluid clearance failure may also relate to aCS-hyperintensity, which may offer new insights into the pathologic processes underlying MCI.
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Affiliation(s)
- Sera Kasai
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Keita Watanabe
- Department of radiology, Kyoto Prefectural University of Medicine, 465 Kajiimachi, Jokyo-ku, Kyoto-shi, Kyoto, Japan.
| | - Satoru Ide
- Department of Radiology, University of Occupational and Environmental Health, School of Medicine, Kitakyushu, Japan
| | - Yuka Ishimoto
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Miho Sasaki
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Yoshihito Umemura
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Soichiro Tatsuo
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Sachi Kakeda
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Tatsuya Mikami
- Innovation Center for Health Promotion, Hirosaki University, Hirosaki, Japan
| | - Yoshinori Tamada
- Innovation Center for Health Promotion, Hirosaki University, Hirosaki, Japan
| | - Yasuo Miki
- Department of Neuropathology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Koichi Wakabayashi
- Department of Neuropathology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Masahiko Tomiyama
- Department of Neurology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Shingo Kakeda
- Department of Radiology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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Corley E, Gleeson C, Godfrey E, Cowman M, Patlola SR, Cannon DM, McKernan DP, Kelly JP, Hallahan B, McDonald C, Morris DW, Burke T, Donohoe G. Corpus callosum microstructural organization mediates the effects of physical neglect on social cognition in schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 2024; 129:110875. [PMID: 37844774 DOI: 10.1016/j.pnpbp.2023.110875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 09/20/2023] [Accepted: 10/11/2023] [Indexed: 10/18/2023]
Abstract
Exposure to early life adversity is associated with both increased risk of developing schizophrenia and poorer performance on measures of social cognitive functioning. In this study, we examined whether interleukin-6 (IL-6) and Corpus Callosum (CC) microstructure mediated the association between childhood physical neglect and social cognition. Fifty-eight patients with a diagnosis of schizophrenia were included. The CANTAB emotion recognition task (unbiased hit rate) was used to assess social cognition. We found that the microstructural organization of the CC significantly mediated the association between physical neglect and emotion recognition. Furthermore, in a sequential mediation analysis that also considered the role of inflammatory response, the association between physical neglect, and lower emotion recognition performance was sequentially mediated by higher IL-6 and lower fractional anisotropy of the CC. This mediating effect of IL-6 was only present when simultaneously considering the effects of CC microstructural organization and remained significant while controlling for the effects of sex, BMI and medication dosage (but not age). Overall, the findings suggest that the association between physical neglect and poorer emotion recognition in schizophrenia occurs, at least in part, via its association with white matter microstructure.
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Affiliation(s)
- Emma Corley
- School of Psychology, University of Galway, Ireland; Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland
| | - Christina Gleeson
- School of Psychology, University of Galway, Ireland; Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland
| | - Emmet Godfrey
- School of Psychology, University of Galway, Ireland; Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland
| | - Megan Cowman
- School of Psychology, University of Galway, Ireland; Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland
| | | | - Dara M Cannon
- Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland; Clinical Neuroimaging Laboratory, Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, University of Galway, Ireland
| | - Declan P McKernan
- Clinical Neuroimaging Laboratory, Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, University of Galway, Ireland
| | - John P Kelly
- Clinical Neuroimaging Laboratory, Galway Neuroscience Centre, College of Medicine Nursing and Health Sciences, University of Galway, Ireland
| | - Brian Hallahan
- Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland; Department of Psychiatry, Clinical Science Institute, University of Galway, Ireland
| | - Colm McDonald
- Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland; Department of Psychiatry, Clinical Science Institute, University of Galway, Ireland
| | - Derek W Morris
- Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland; School of Biological and Chemical Sciences, University of Galway, Ireland
| | - Tom Burke
- School of Psychology, University of Galway, Ireland; Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland
| | - Gary Donohoe
- School of Psychology, University of Galway, Ireland; Center for Neuroimaging Cognition and Genomics, University of Galway, Ireland.
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Patnaik A, Sekar A, Sujana B. Corpus Callosal Hematoma by a Trivial Trauma Causing Concussion with "Blood at the Center" Radiological Sign. World Neurosurg 2024; 182:7-11. [PMID: 37949298 DOI: 10.1016/j.wneu.2023.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023]
Abstract
Hematoma of corpus callosum is a very rare phenomenon and is caused by severe trauma to head. Most common traumatic injury to corpus callosum is seen in diffuse axonal injury in form of small hemorrhagic foci and associated prolonged unconsciousness. Trivial trauma causing well defined corpus callosal hematoma in absence of coagulation defects or neurological deficits in conscious patient has not been reported in the literature. We present such a unique case and the review the corpus callosal hematoma due to trauma.
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Affiliation(s)
- Ashis Patnaik
- Department of Neurosurgery, All India Institute of Medical sciences (AIIMS), Bhubaneswar, Odisha, India.
| | - Arunkumar Sekar
- Department of Neurosurgery, All India Institute of Medical sciences (AIIMS), Bhubaneswar, Odisha, India
| | - Bollimuntha Sujana
- Department of Neurosurgery, All India Institute of Medical sciences (AIIMS), Bhubaneswar, Odisha, India
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Wang P, Jiang Y, Biswal BB. Aberrant interhemispheric structural and functional connectivity within whole brain in schizophrenia. Schizophr Res 2024; 264:336-344. [PMID: 38218019 DOI: 10.1016/j.schres.2023.12.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/27/2023] [Accepted: 12/26/2023] [Indexed: 01/15/2024]
Abstract
OBJECTIVE Schizophrenia is a serious mental disorder whose etiology remains unclear. Although numerous studies have analyzed the abnormal gray matter functional activity and whole-brain anatomical changes in schizophrenia, fMRI signal fluctuations from white matter have usually been ignored and rarely reported in the literature. METHODS We employed 45 schizophrenia subjects and 75 healthy controls (HCs) from a publicly available fMRI dataset. By combining the voxel-mirrored homotopic connectivity (VMHC) measure and fiber tracking method, we investigated the interhemispheric functional and structural connectivity within whole brain in schizophrenia. RESULTS Compared to HCs, patients with schizophrenia exhibited significantly reduced VMHC in the bilateral middle occipital gyrus, precentral gyrus, postcentral gyrus and corpus callosum. Fiber tracking results showed the changes in structural connectivity for the bilateral precentral gyrus, and the bilateral corpus callosum, and the fiber bundles connecting bilateral precentral gyrus and connecting the bilateral corpus callosum passed through the posterior midbody, isthmus and splenium of mid-sagittal corpus callosum, which closely related to the interhemispheric integration of visual and auditory information. More importantly, we observed a negative correlation between averaged VMHC values in the postcentral gyrus and SAPS scores, and a positive correlation between the fractional anisotropy of fiber bundle connecting the bilateral precentral gyrus and Matrix Reasoning scores in schizophrenia. CONCLUSION Our findings provide a novel perspective of white matter functional images on understanding abnormal interhemispheric visual and auditory information transfer in schizophrenia.
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Affiliation(s)
- Pan Wang
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Yuan Jiang
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Bharat B Biswal
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China; Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.
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10
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Liu S, Yang D, Dong S, Luo Y, Zhang T, Li S, Bai Y, Li L, Ma Y, Liu J. Effects of acrylamide exposure during pregnancy and lactation on the development of myelin sheath of corpus callosum in offspring rats. Toxicol Res (Camb) 2024; 13:tfae014. [PMID: 38314039 PMCID: PMC10836055 DOI: 10.1093/toxres/tfae014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/20/2023] [Accepted: 01/15/2023] [Indexed: 02/06/2024] Open
Abstract
Acrylamide is an alkene known to induce neurotoxicity in humans and experimental animals. However, the effects of acrylamide on the development of myelin sheath are unclear. The present study was to explore the effects of acrylamide exposure during pregnancy and lactation on the development of myelin sheath in offspring rats. Four groups of thirty-two pregnant Sprague-Dawley rats were exposed to 0, 4.5, 9 and 18 mg/kg BW acrylamide by gavage from gestational day 15 to postnatal day 13. The corpus callosum of nine offspring rats per group were dissected in postpartum day 14. Structural changes and lipid contents in myelin sheaths were examined by transmission electron microscopy(TEM) and Luxol Fast Blue staining(LFB). The expression of MBP and PLP was evaluated by immunohistochemistry and Western blotting. TEM showed that the myelin sheaths in the 18 mg/kg group were disordered compared with control group. Luxol Fast Blue staining gradually decreased with increasing acrylamide maternal exposure. The immunohistochemistry and Western Blotting results showed that maternal exposure to acrylamide caused a decreasing trend in MBP and PLP in the corpus callosum of rats at postnatal day 14. Furthermore, these reduced protein levels may be neurodevelopmental toxicity's mechanism in response to maternal exposure to acrylamide.
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Affiliation(s)
- Shuping Liu
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Dehui Yang
- Lianjiang People's Hospital, No. 30 Renmin Avenue Middle, Lianjiang City, Zhanjiang City, Guangdong Province, Lianjiang 524400, PR China
| | - Suqiu Dong
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Yuyou Luo
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Tong Zhang
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Siyuan Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Yanxian Bai
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Lixia Li
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Yuxin Ma
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
| | - Jing Liu
- Department of Human Anatomy, Histology and Embryology, School of Basic Medicine, Guangdong Pharmaceutical University, No. 280, Outer Ring East Road, Guangzhou University City, Panyu District, Guangzhou City, Guangzhou 510006, PR China
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Porcu M, Cocco L, Marrosu F, Cau R, Suri JS, Qi Y, Pineda V, Bosin A, Malloci G, Ruggerone P, Puig J, Saba L. Impact of corpus callosum integrity on functional interhemispheric connectivity and cognition in healthy subjects. Brain Imaging Behav 2024; 18:141-158. [PMID: 37955809 DOI: 10.1007/s11682-023-00814-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/15/2023] [Indexed: 11/14/2023]
Abstract
To examine the corpus callosum's (CC) integrity in terms of fractional anisotropy (FA) and how it affects resting-state hemispheric connectivity (rs-IHC) and cognitive function in healthy individuals. Sixty-eight healthy individuals were recruited for the study. The global FA (gFA) and FA values of each CC tract (forceps minor, body, tapetum, and forceps major) were evaluated using diffusion-weighted imaging (DWI) sequences. The homotopic functional connectivity technique was used to quantify the effects of FA in the CC tracts on bilateral functional connectivity, including the confounding effect of gFA. Brain regions with higher or lower rs-IHC were identified using the threshold-free cluster enhancement family-wise error-corrected p-value of 0.05. The null hypothesis was rejected if the p-value was ≤ 0.05 for the nonparametric partial correlation technique. Several clusters of increased rs-IHC were identified in relation to the FA of individual CC tracts, each with a unique topographic distribution and extension. Only forceps minor FA values correlated with cognitive scores. The integrity of CC influences rs-IHC differently in healthy subjects. Specifically, forceps minor anisotropy impacts rs-IHC and cognition more than other CC tracts do.
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Affiliation(s)
- Michele Porcu
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy.
- Department of Medical Imaging, Azienda Ospedaliera Universitaria di Cagliari, S.S: 554, Km 4,500 - CAP, Monserrato, 09042, Cagliari, Italy.
| | - Luigi Cocco
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
| | - Francesco Marrosu
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
| | - Riccardo Cau
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
| | - Jasjit S Suri
- Stroke Monitoring and Diagnostic Division, AtheroPoint™, Roseville, CA, USA
| | - Yang Qi
- Xuanwu Hospital, Capital Medical University, No.45 Changchun Street, Xicheng District, Beijing, China
| | - Victor Pineda
- Department of Medical Sciences, Hospital Universitari de Girona Dr Josep Trueta, Girona, Spain
- Department of Radiology (IDI), Hospital Universitari de Girona Dr Josep Trueta, Girona, Spain
| | - Andrea Bosin
- Department of Physics, University of Cagliari, Cagliari, Italy
| | | | - Paolo Ruggerone
- Department of Physics, University of Cagliari, Cagliari, Italy
| | - Josep Puig
- Department of Medical Sciences, Hospital Universitari de Girona Dr Josep Trueta, Girona, Spain
- Department of Radiology (IDI), Hospital Universitari de Girona Dr Josep Trueta, Girona, Spain
| | - Luca Saba
- Department of Radiology, AOU Cagliari, University of Cagliari, Cagliari, Italy
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Riedel D, Lorke N, Fellerhoff T, Mierau A, Strüder HK, Wolf D, Fischer F, Fellgiebel A, Tüscher O, Kollmann B, Knaepen K. Interhemispheric transfer time correlates with white matter integrity of the corpus callosum in healthy older adults. Neuropsychologia 2024; 193:108761. [PMID: 38104856 DOI: 10.1016/j.neuropsychologia.2023.108761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 12/10/2023] [Accepted: 12/14/2023] [Indexed: 12/19/2023]
Abstract
The corpus callosum (CC) has been identified as an important structure in the context of cognitive aging (Fling et al., 2011). Interhemispheric transfer time (IHTT) is regularly used in order to estimate interhemispheric integration enabled by the CC (Marzi, 2010; Nowicka and Tacikowski, 2011). However, only little is known with regards to the relationship between IHTT and the structural properties of the CC with only few studies with specific samples and methods available (Whitford et al., 2011). Thus, the present study aimed at investigating this relationship applying an event-related potentials (ERP) based approach of estimating IHTT as well as diffusion weighted imaging (DWI) with fractional anisotropy (FA) as an indicator of white matter integrity (WMI) of the genu, corpus and splenium of the CC. 56 healthy older adults performed a Dimond Task while ERPs were recorded and underwent DWI scanning. IHTT derived from posterior electrode sites correlated significantly with FA of the splenium (r = -0.286*, p = .03) but not the corpus (r = -0.187, p = .08) or genu (r = -0.189, p = .18). The present results support the notion that IHTT is related to WMI of the posterior CC. It may be concluded that ERP based IHTT is a suitable indicator of CC structure and function, however, likely specific to the interhemispheric transfer of visual information. Future studies may wish to confirm these findings in a more divers sample further exploring the precise interrelation between IHTT and structural or functional properties of the CC.
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Affiliation(s)
- David Riedel
- Institute of Movement and Neurosciences, German Sport University Cologne, Address: Am Sportpark Müngersdorf 6, 50933, Cologne, Germany.
| | - Nicolai Lorke
- Institute of Movement and Neurosciences, German Sport University Cologne, Address: Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
| | - Tim Fellerhoff
- Institute of Movement and Neurosciences, German Sport University Cologne, Address: Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
| | - Andreas Mierau
- Institute of Movement and Neurosciences, German Sport University Cologne, Address: Am Sportpark Müngersdorf 6, 50933, Cologne, Germany; Department of Exercise and Sport Science, LUNEX International University of Health, Exercise and Sports, Address: 50, Avenue du Parc des Sports, L-4671, Differdange, Luxembourg
| | - Heiko K Strüder
- Institute of Movement and Neurosciences, German Sport University Cologne, Address: Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
| | - Dominik Wolf
- Department of Psychiatry and Psychotherapy, University Medical Center Mainz, Address: Untere Zahlbacher Str. 8, 55131, Mainz, Germany
| | - Florian Fischer
- Department of Psychiatry and Psychotherapy, University Medical Center Mainz, Address: Untere Zahlbacher Str. 8, 55131, Mainz, Germany
| | - Andreas Fellgiebel
- Department of Psychiatry and Psychotherapy, University Medical Center Mainz, Address: Untere Zahlbacher Str. 8, 55131, Mainz, Germany; Center for Mental Health in Old Age, Landeskrankenhaus (AöR), Address: Hartmühlenweg 2-4, 55122, Mainz, Germany
| | - Oliver Tüscher
- Department of Psychiatry and Psychotherapy, University Medical Center Mainz, Address: Untere Zahlbacher Str. 8, 55131, Mainz, Germany; Leibniz Institute for Resilience Research (LIR), Address: Wallstraße 7, 55122, Mainz, Germany; Institute of Molecular Biology (IMB), Mainz, Address: Ackermannweg 4, 55128, Mainz, Germany
| | - Bianca Kollmann
- Department of Psychiatry and Psychotherapy, University Medical Center Mainz, Address: Untere Zahlbacher Str. 8, 55131, Mainz, Germany; Leibniz Institute for Resilience Research (LIR), Address: Wallstraße 7, 55122, Mainz, Germany
| | - Kristel Knaepen
- Institute of Movement and Neurosciences, German Sport University Cologne, Address: Am Sportpark Müngersdorf 6, 50933, Cologne, Germany
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Yang X, Chang L, Liu Z, Geng X, Wang R, Yin X, Fan W, Zhao BQ. Neddylation in the chronically hypoperfused corpus callosum: MLN4924 reduces blood-brain barrier injury via ERK5/KLF2 signaling. Exp Neurol 2024; 371:114587. [PMID: 37914067 DOI: 10.1016/j.expneurol.2023.114587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/13/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023]
Abstract
Blood-brain barrier (BBB) breakdown and cerebrovascular dysfunction may contribute to the pathology in white matter lesions and consequent cognitive decline caused by cerebral hypoperfusion. Neddylation is the process of attaching a ubiquitin-like molecule NEDD8 (neuronal precursor cell-expressed developmentally downregulated protein 8) to specific targets. By modifying protein substrates, neddylation plays critical roles in various important biological processes. However, whether neddylation influences the pathogenesis of hypoperfused brain remains unclear. In the present study, cerebral hypoperfusion-induced white matter lesions were produced by bilateral common carotid artery stenosis in mice. The function of the neddylation pathway, BBB integrity, cerebrovascular dysfunction, myelin density in the corpus callosum and cognitive function were determined. We show that NEDD8 conjugation aberrantly amplified in microvascular endothelium in the corpus callosum following cerebral hypoperfusion. MLN4924, a small-molecule inhibitor of NEDD8-activating enzyme currently in clinical trials, preserved BBB integrity, attenuated glial activation and enhanced oligodendrocyte differentiation, and reduced hypoperfusion-induced white matter lesions in the corpus callosum and thus improved cognitive performance via inactivating cullin-RING E3 ligase (CRL). Administration of MLN4924 caused the accumulation of ERK5 and KLF2. The ERK5 inhibitor BIX 02189, down-regulated MLN4924-induced activation of KLF2 and reversed MLN4924-mediated increase in pericyte coverage and junctional proteins. Furthermore, BIX 02189 blocked MLN4924-afforded protection against BBB disruption and white matter lesions in the corpus callosum. Collectively, our results revealed that neddylation impairs vascular function and thus exacerbated the pathology of hypoperfused brain and that inhibition of neddylation with MLN4924 may offer novel therapeutic opportunities for cerebral hypoperfusion-associated cognitive impairment.
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Affiliation(s)
- Xing Yang
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Luping Chang
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Zhongwang Liu
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Xue Geng
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Ranran Wang
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Xuhui Yin
- Institute of Neuroscience and Third Affiliated Hospital, Zhengzhou University, Zhengzhou 450052, China
| | - Wenying Fan
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China.
| | - Bing-Qiao Zhao
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China.
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Hasaniani N, Ghasemi-Kasman M, Halaji M, Rostami-Mansoor S. Bifidobacterium breve Probiotic Compared to Lactobacillus casei Causes a Better Reduction in Demyelination and Oxidative Stress in Cuprizone-Induced Demyelination Model of Rat. Mol Neurobiol 2024; 61:498-509. [PMID: 37639065 DOI: 10.1007/s12035-023-03593-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 08/17/2023] [Indexed: 08/29/2023]
Abstract
Despite the anatomical separation, strong evidence suggested a bidirectional association between gut microbiota and central nervous system. Cross-talk between gut microbiota and brain has an important role in the pathophysiology of neurodegenerative disorders and regenerative processes. However, choosing the appropriate probiotics and combination therapy of probiotics to provide a synergistic effect is very crucial. In the present study, we investigated the effect of Lactobacillus casei (L. casei) and Bifidobacterium breve (B. breve) on alternation performance, oxidant/antioxidant biomarkers, the extent of demyelination, and the expression level of HO-1, Nrf-2, Olig2, MBP, PDGFRα, and BDNF in cuprizone (CPZ)-induced demyelination model of rat corpus callosum. In order to induce this model, rats received oral administration of CPZ 0.6% w/w in corn oil for 28 days. Then, L. casei, B. breve, or their combinations were orally administrated for 28 days. Y maze test was performed to investigate the alternation performance. Oxidant/antioxidant biomarkers were determined by colorimetric methods. Extent of demyelination was investigated using FluoroMyelin staining. The genes' expression levels of antioxidant and myelin lineage cells were assessed by quantitative real time PCR. The results showed the probiotics supplementation significantly improve the alternation performance and antioxidant capacity in demyelinated corpus callosum. Interestingly, B. breve supplementation alleviated demyelination and oxidative stress levels more than the administration of L. casei alone or the combination of two probiotics. These observations suggest that B. breve could provide a supplementary strategy for the treatment of multiple sclerosis by increasing antioxidant capacity and remyelination.
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Affiliation(s)
- Nima Hasaniani
- Student Research Committee, Babol University of Medical Sciences, Babol, Iran
- Department of Clinical Biochemistry, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Maryam Ghasemi-Kasman
- Cellular and Molecular Biology Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
- Department of Physiology, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Mehrdad Halaji
- Infectious Diseases and Tropical Medicine Research Center, Babol University of Medical Sciences, Babol, Iran
| | - Sahar Rostami-Mansoor
- Department of Clinical Biochemistry, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran.
- Department of Laboratory Sciences, Faculty of Paramedical Sciences, Babol University of Medical Sciences, Babol, Iran.
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Pedro T, Prisco I, Albuquerque L, Vaz R, Silva PA. The distance between the falx cerebri and the corpus callosum in patients with bilateral subdural hematomas: A potential measure of disease severity. Clin Neurol Neurosurg 2024; 236:108090. [PMID: 38160657 DOI: 10.1016/j.clineuro.2023.108090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 10/27/2023] [Accepted: 12/17/2023] [Indexed: 01/03/2024]
Abstract
BACKGROUND We aimed to assess the usefulness of the falx cerebri and the corpus callosum measurements as imaging markers of the evaluation of patients with bilateral subdural hematomas. METHODS The anterior-posterior and craniocaudal distances between the falx cerebri (FC) and the corpus callosum (CC) were retrospectively measured in 88 head CT scans from 2018 to 2022 from patients with bilateral subdural hematomas and associated with quantitative data and clinical outcomes. Statistical analysis was performed using multivariate regression and receiver operating characteristic curves. RESULTS Of the 88 patients included, 77.3% were male and the median age of 76.0 years (interquartile range 14.0). The mean craniocaudal and anterior-posterior FC-CC distances were 27.6 ± 6.2 mm and 25.1 ± 6.9 mm, respectively, and showed a positive correlation with hematoma thickness and volume. Both anterior-posterior and craniocaudal FC-CC distances exhibited moderate to good inter-rater reliability. After adjusting for confounders, the craniocaudal FC-CC distance was associated with an increased risk of altered consciousness at admission (OR=1.013; 95% CI 1.001-1.024; p = 0.031), downward displacement of the third ventricle (OR=1.019; 95% CI 1.001-1.038; p = 0.035), and a reduced time to surgery (β = 0.057; 95% CI 0.007-0.107; p = 0.027). CONCLUSION This study emphasizes that increased FC-CC distances in patients with bilateral subdural hematomas may aid clinical decision-making and are associated with larger hematoma volumes, evidence of descending transtentorial herniation on imaging, and a heightened risk of altered consciousness at admission.
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Affiliation(s)
- Tiago Pedro
- Department of Neuroradiology, Centro Hospitalar Universitário de São João, E.P.E., Porto, Portugal.
| | - Inês Prisco
- Department of Neuroradiology, Unidade Local de Saúde de Matosinhos, E.P.E., Porto, Portugal
| | - Luís Albuquerque
- Department of Neuroradiology, Centro Hospitalar Universitário de São João, E.P.E., Porto, Portugal
| | - Rui Vaz
- Department of Neurosurgery, Centro Hospitalar Universitário de São João, E.P.E., Porto, Portugal; Department of Clinical Neurosciences and Mental Health, Faculty of Medicine of University of Porto, Portugal
| | - Pedro Alberto Silva
- Department of Neurosurgery, Centro Hospitalar Universitário de São João, E.P.E., Porto, Portugal; Department of Clinical Neurosciences and Mental Health, Faculty of Medicine of University of Porto, Portugal
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Sugii N, Ninomiya Y, Akimoto Y, Tsurubuchi T, Ishikawa E. H3 K27-altered diffuse midline glioma in adults arising from atypical regions: Two case reports and literature review. Radiol Case Rep 2024; 19:200-206. [PMID: 38028289 PMCID: PMC10651424 DOI: 10.1016/j.radcr.2023.10.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/06/2023] [Accepted: 10/13/2023] [Indexed: 12/01/2023] Open
Abstract
Diffuse midline glioma (DMG), H3 K27-altered, is a newly defined "pediatric-type," diffuse, high-grade glioma under current WHO classifications (updated in 2021). An essential diagnostic criteria of DMG is its occurrence in the midline structures; most intracranial DMG occurs in the brainstem or thalamus but can also occur in other midline structures. We experienced 2 adult cases of intracranial DMGs in areas other than the brainstem and thalamus that were initially difficult to diagnose. Case 1 was a 49-year-old man with extensive T2 high-signal lesions in the bilateral frontal lobes and corpus callosum on brain MRI. A Gd-based contrast medium partially enhanced the lesion and showed marked diffusion restriction, mimicking malignant lymphoma. Case 2 was a 24-year-old man who presented with paroxysmal olfactory abnormalities. The tumor extended mainly to the right temporal lobe, the right basal forebrain, and the bilateral hypothalamus, showing a T2/FLAIR mismatch sign suggestive of IDH-mutant astrocytoma without 1p/19q co-deletion. After a biopsy, both cases were properly diagnosed as DMG, H3 K27-altered (K27M-mutant). Diagnosing adult cases involving atypical midline structures is sometimes challenging before surgery; we discuss this phenomenon with both case details and a literature review.
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Affiliation(s)
- Narushi Sugii
- Department of Neurosurgery, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575 Japan
| | - Yuki Ninomiya
- Department of Neurosurgery, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575 Japan
| | - Yu Akimoto
- Department of Neurosurgery, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575 Japan
| | - Takao Tsurubuchi
- Department of Neurosurgery, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575 Japan
| | - Eiichi Ishikawa
- Department of Neurosurgery, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575 Japan
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Moors S, Nakhostin D, Ilchenko D, Kulcsar Z, Starkey J, Winklhofer S, Ineichen BV. Cytotoxic lesions of the corpus callosum: a systematic review. Eur Radiol 2023:10.1007/s00330-023-10524-3. [PMID: 38147170 DOI: 10.1007/s00330-023-10524-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/07/2023] [Accepted: 11/25/2023] [Indexed: 12/27/2023]
Abstract
OBJECTIVES Cytotoxic lesions of the corpus callosum (CLOCC) are a common magnetic resonance imaging (MRI) finding associated with various systemic diseases including COVID-19. Although an increasing number of such cases is reported in the literature, there is a lack of systematic evidence summarizing the etiology and neuroimaging findings of these lesions. Thus, the aim of this systematic review was to synthesize the applied nomenclature, neuroimaging and clinical features, and differential diagnoses as well as associated disease entities of CLOCC. MATERIALS AND METHODS A comprehensive literature search in three biomedical databases identified 441 references, out of which 324 were eligible for a narrative summary including a total of 1353 patients. RESULTS Our PRISMA-conform systematic review identifies a broad panel of disease entities which are associated with CLOCC, among them toxic/drug-treatment-associated, infectious (viral, bacterial), vascular, metabolic, traumatic, and neoplastic entities in both adult and pediatric individuals. On MRI, CLOCC show typical high T2 signal, low T1 signal, restricted diffusion, and lack of contrast enhancement. The majority of the lesions were reversible within the follow-up period (median follow-up 3 weeks). Interestingly, even though CLOCC were mostly associated with symptoms of the underlying disease, in exceptional cases, CLOCC were associated with callosal neurological symptoms. Of note, employed nomenclature for CLOCC was highly inconsistent. CONCLUSIONS Our study provides high-level evidence for clinical and imaging features of CLOCC as well as associated disease entities. CLINICAL RELEVANCE STATEMENT Our study provides high-level evidence on MRI features of CLOCC as well as a comprehensive list of disease entities potentially associated with CLOCC. Together, this will facilitate rigorous diagnostic workup of suspected CLOCC cases. KEY POINTS • Cytotoxic lesions of the corpus callosum (CLOCC) are a frequent MRI feature associated with various systemic diseases. • Cytotoxic lesions of the corpus callosum show a highly homogenous MRI presentation and temporal dynamics. • This comprehensive overview will benefit (neuro)radiologists during diagnostic workup.
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Affiliation(s)
- Selina Moors
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, Zurich, Switzerland
| | - Dominik Nakhostin
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, Zurich, Switzerland
| | - Dariya Ilchenko
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, Zurich, Switzerland
| | - Zsolt Kulcsar
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, Zurich, Switzerland
| | - Jay Starkey
- Department of Radiology, Oregon Health & Science University, Portland, OR, USA
| | - Sebastian Winklhofer
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, Zurich, Switzerland
| | - Benjamin V Ineichen
- Department of Neuroradiology, Clinical Neuroscience Center, University Hospital of Zurich, Zurich, Switzerland.
- Center for Reproducible Science, University of Zurich, Zurich, Switzerland.
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Mouihate A, Kalakh S. Breastfeeding promotes oligodendrocyte precursor cells division and myelination in the demyelinated corpus callosum. Brain Res 2023; 1821:148584. [PMID: 37717888 DOI: 10.1016/j.brainres.2023.148584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 09/19/2023]
Abstract
Demyelination alters the conduction of neuronal signals and hampers sensory-motor functions. Experimental and clinical evidence suggest that breastfeeding exerts a promyelinating impact on the maternal brain. The mechanism underlying this neuroprotective effect is not well-understood. In the present paper, we assessed the impact of rat lactation on lysolecithin-induced demyelination injury within the corpus callosum of lactating and non-lactating postpartum rats. We show that lactation enhanced the cell density of oligodendrocyte precursor cells (OPCs), but not that of activated microglia and astrocytes, within the demyelination lesion. Lactation also increased the expression of myelin markers involved in the initial stage of myelin recovery (Myelin-associated glycoprotein and 2',3'-cyclic nucleotide 3'-phosphodiesterase) and reduced the demyelination injury. Altogether, these data suggest that lactation creates a conducive promyelinating environment through increased OPCs cell division, enhanced expression of select myelin proteins, and reduced number of non-myelinated axons.
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Affiliation(s)
- Abdeslam Mouihate
- Department of Physiology, College of Medicine, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait.
| | - Samah Kalakh
- Department of Physiology, College of Medicine, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait
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Winkler I, Sappler M, Gizewski ER, Kiechl-Kohlendorfer U, Neubauer V, Griesmaier E. Relationship between Brain Function and Microstructural Brain Maturation in Preterm Infants. Neonatology 2023:1-9. [PMID: 38052194 DOI: 10.1159/000535042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 11/01/2023] [Indexed: 12/07/2023]
Abstract
INTRODUCTION Preterm infants are at risk for impairment in brain maturation at term equivalent age (TEA). Diffusion tensor imaging (DTI) is a powerful magnetic resonance imaging (MRI) technique, quantitatively reflecting microstructural brain development of white matter regions with parameters such as fractional anisotropy (FA) and apparent diffusion coefficient (ADC). Amplitude-integrated electroencephalography (aEEG) assesses electrocortical activity and brain function. METHODS Aim of this study was to investigate a possible correlation between functional and microstructural brain maturation using neonatal aEEG and DTI-MRI at TEA. The study was conducted as a retrospective single-center study in 446 infants born below 32 gestational weeks. Spearman rank's correlation coefficients were calculated between aEEG (total maturation score) and FA/ADC value. To compare aEEG and DTI-MRI to neurodevelopmental outcome at 24 months of corrected age, we performed a multivariate linear regression analysis. RESULTS Analysis showed an all-time significant correlation between total maturation score and FA/ADC values of the corpus callosum at TEA with the strongest correlation at day 2, day 3, week 3, and week 4. After including perinatal variables in the model, this correlation remained highly significant at day 2 and 3. When comparing the association of aEEG and DTI-MRI to outcome, both the total maturation score at day 2, day 3, and FA/ADC of the splenium of the corpus callosum showed a significant correlation. CONCLUSION This study indicates that early monitoring of functional brain maturation may predict later assessment of microstructural brain development of corpus callosum in preterm infants with a relation to neurodevelopmental outcome.
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Affiliation(s)
- Ira Winkler
- Department of Pediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | - Maria Sappler
- Department of Pediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | - Elke Ruth Gizewski
- Department of Neuroradiology, Medical University of Innsbruck, Innsbruck, Austria
- Neuroimaging Research Core Facility, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Vera Neubauer
- Department of Pediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | - Elke Griesmaier
- Department of Pediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
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Westerhausen R. Interhemispheric Integration after Callosotomy: A Meta-Analysis of Poffenberger and Redundant-Target Paradigms. Neuropsychol Rev 2023; 33:872-890. [PMID: 36484870 PMCID: PMC10769931 DOI: 10.1007/s11065-022-09569-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 11/16/2022] [Indexed: 12/13/2022]
Abstract
The central role of the corpus callosum in integrating perception and cognition across the cerebral hemispheres makes it highly desirable for clinical and basic research to have a repertoire of experimental paradigms assessing callosal functioning. Here, the objective was to assess the validity of two such paradigms (Poffenberger, redundant-target paradigms) by conducting single-step meta-analyses on individual case data of callosotomy patients. Studies were identified by systematic literature search (source: Pubmed and WebOfKnowledge, date: 07.03.2022) and all studies were included that reported callosotomy case data for either paradigm. Twenty-two studies (38 unique cases) provided 116 observations of the crossed-uncrossed difference (CUD) for the Poffenberger paradigm, while ten studies (22 cases, 103 observations) provided bilateral redundancy gain (bRG) measures. Using linear-mixed models with "individual" and "experiment" as random-effects variable, the mean CUD was estimated at 60.6 ms (CI95%: 45.3; 75.9) for commissurotomy, 43.5 ms (26.7; 60.2) for complete callosotomy, and 8.8 ms (1.1; 16.6) for partial anterior-medial callosotomy patients. The estimates of commissurotomy/callosotomy patients differed significantly from patients with partial callosotomy and healthy controls. The mean bRGmin (minimum unilateral reference) was estimated at 42.8 ms (27.1;58.4) for patients with complete and 30.8 ms (16.8; 44.7) for patients with partial callosotomy, both differing significantly from controls. One limitation was that different formulas for bRG were used, making it necessary to split the sample and reducing test power of some analyses. Nevertheless, the present findings suggest that both paradigms assess interhemispheric callosal integration, confirming their construct validity, but likely test distinct callosal functions.
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Affiliation(s)
- René Westerhausen
- Section for Cognitive and Clinical Neuroscience, Department of Psychology, University of Oslo, POB 1094 Blindern, Oslo, 0317, Norway.
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Yamao Y, Funaki T, Yamada H, Okawa M, Mineharu Y, Kikuchi T, Fushimi Y, Kataoka H, Yoshida K, Takahashi JC, Miyamoto S, Arakawa Y. "Transcallosal" periventricular anastomosis in moyamoya disease: the fourth periventricular anastomosis and a potential predictor of hemorrhage. J Stroke Cerebrovasc Dis 2023; 32:107428. [PMID: 37924782 DOI: 10.1016/j.jstrokecerebrovasdis.2023.107428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/09/2023] [Accepted: 10/12/2023] [Indexed: 11/06/2023] Open
Abstract
OBJECTIVES Choroidal anastomosis is a risk factor for hemorrhage in moyamoya disease. One variant of choroidal anastomosis, "transcallosal anastomosis," originates from the medial posterior choroidal artery, and penetrates the corpus callosum to reconstruct the pericallosal artery. We aimed to investigate the prevalence and the bleeding rate of transcallosal anastomosis using sliding thin-slab maximum intensity projection reformatted from magnetic resonance angiography (MRA). MATERIALS AND METHODS This study included 222 patients. We defined transcallosal anastomosis grades (0-2) and the stenosis of the anterior (ACA, 0-2), middle (MCA, 1-3), and posterior cerebral artery (PCA, 0-2) by MRA scores, independently by two coauthors. RESULTS Grade-2 transcallosal anastomosis was detected in 21 patients (9.5 %). There were no correlations of the incidence of transcallosal anastomosis with previous bypass surgery (P = 0.23). Multivariate analysis revealed a significantly higher incidence in hemorrhagic onset and younger age (odds ratio [OR] 3.77, and 0.97). Transcallosal anastomosis had statistically significant correlation with ACA and PCA scores (P = 0.01 and 0.03), but not with MCA scores (P = 0.1). In multivariate analysis, ACA scores 1 and 2 were significantly higher (OR, 15.44 and 11.17), and PCA score 1 was also higher (OR, 3.07), but PCA score 2 was not. Interrater agreement for judgment of transcallosal anastomosis grade was strong (κ = 0.89). Two patients with Grade-2 transcallosal anastomosis had late hemorrhage in the corpus callosum (bleeding rate: 2.5 % per year). CONCLUSIONS Transcallosal anastomosis may be associated with both advanced ACA and moderate PCA stenosis, and cause hemorrhage at the corpus callosum.
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Affiliation(s)
- Yukihiro Yamao
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan.
| | - Takeshi Funaki
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hiroki Yamada
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masakazu Okawa
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yohei Mineharu
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Takayuki Kikuchi
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yasutaka Fushimi
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Hiroharu Kataoka
- Department of Neurosurgery, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Kazumichi Yoshida
- Department of Neurosurgery, Shiga University of Medical Science, Otsu, Japan
| | - Jun C Takahashi
- Department of Neurosurgery, Kindai University Faculty of Medicine, Osaka-Sayama, Japan
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan; Moyamoya Disease Support Center, Kyoto University Hospital, Kyoto, Japan; Stroke Support Center, Kyoto University Hospital, Kyoto, Japan
| | - Yoshiki Arakawa
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Cerimagic D. Iatrogenic encephalopathy or reversible splenial lesion syndrome (RESLES)? Clin Neurol Neurosurg 2023; 235:108046. [PMID: 37949040 DOI: 10.1016/j.clineuro.2023.108046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/01/2023] [Accepted: 11/04/2023] [Indexed: 11/12/2023]
Affiliation(s)
- Denis Cerimagic
- Department of Neurology, University of Dubrovnik and Polyclinic Glavic, Cira Carica 3, HR-20000 Dubrovnik, Croatia.
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23
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Ajare EC, Campbell FC, Mgbe EK, Efekemo AO, Onuh AC, Nnamani AO, Okwunodulu O, Ohaegbulam SC. MRI-based morphometric analysis of corpus callosum dimensions of adults in Southeast Nigeria. Libyan J Med 2023; 18:2188649. [PMID: 36946121 PMCID: PMC10035938 DOI: 10.1080/19932820.2023.2188649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023] Open
Abstract
The Corpus callosum (CC) is the largest commissural fibre tract, ensuring swift information transfer and integration in both cerebral hemispheres. Variations in morphometry exist. There is a paucity of data on CC dimensions in our subregion, and no standardized reference is available. The study aims to determine the CC dimensions among the adult population in southeast Nigeria. The result will provide reference ranges and form a benchmark for comparisons of CC-related pathologies. A retrospective study of CC morphometric dimensions in normal subjects who had cranial MRI over two years in Memfys Hospital, Enugu, Southeast Nigeria, using a 1.5T GE© 16 channel machine. The CC was segmentalized into seven subregions using the modified Witelson method with special computer software. All measurements were taken twice from the T1 mid-sagittal image, and the mean was used for computation. The results were analyzed using descriptive and inferential statistics. A total of 200 subjects were recruited for the study. The mean length and height of the CC were 75.58 ± 4.52 mm and 24.64 ± 3.40 mm, respectively. The width dimensions of the genu, body, rostrum and splenium were 10.88 ± 1.81 mm, 5.66 ± 1.32 mm, 3.65 ± 1.25 mm, and 10.02 ± 1.70 mm, respectively. No gender variations were noted among the different dimensions of CC (P = 0.90). The length and height of CC increase gradually with age and show a positive correlation. The width dimensions of the genu and splenium increase till middle age and subsequently decreases in line with brain atrophy (p = 0.0000& p = 0.004). Using Pearson's correlation test, no correlation was noted in the dimensions of the body and rostrum of the corpus callosum when related to age and sex. (P = 0.92 & p = 0.66). Reference ranges of CC dimensions in our subregion were presented, and variations exist in its different morphometric dimensions which are affected by brain atrophy. Gender does not influence the dimensions in our subpopulations.
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Affiliation(s)
- Enyereibe Chuks Ajare
- Department of Radiation Medicine, Faculty of Medical Sciences, College of Medicine, University of Nigeria, Enugu, Nigeria
- Department of Radiology, Memfys Hospital, Enugu, Nigeria
| | | | - Emeka K Mgbe
- Department of Radiation Medicine, Faculty of Medical Sciences, College of Medicine, University of Nigeria, Enugu, Nigeria
| | - Aghogho O Efekemo
- Department of Radiology, University of Benin Teaching Hospital, Benin City, Nigeria
| | - Augustine Chukwudi Onuh
- Department of Radiation Medicine, Faculty of Medical Sciences, College of Medicine, University of Nigeria, Enugu, Nigeria
- Department of Radiology, Memfys Hospital, Enugu, Nigeria
| | - A O Nnamani
- Department of Radiation Medicine, Faculty of Medical Sciences, College of Medicine, University of Nigeria, Enugu, Nigeria
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Quan K, Qin X, Song J, Zhu W. How we do it? The surgical resection of a medial parietal arteriovenous malformation under multimodal imaging technology-guided hybrid operation. Acta Neurochir (Wien) 2023; 165:3787-3791. [PMID: 37845355 DOI: 10.1007/s00701-023-05836-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 10/03/2023] [Indexed: 10/18/2023]
Abstract
BACKGROUND This report described the surgical resection of a challenging medial parietal lobe arteriovenous malformation (AVM) using the hybrid operation theater with a multimodal imaging-guided technology. METHOD A 29-year-old male was admitted to treat a ruptured medial parietal AVM. The deep and diffusive compartment of the nidus was embolized before resection. Preoperatively and intraoperatively, mixed reality technology with multimodality imaging was utilized for surgical planning and navigation. The nidus was totally resected and confirmed by intraoperative angiography. The patient recovered without sequella. CONCLUSION We hope this report provides new insights into applying multimodal imaging technology-guided hybrid operation for brain AVM.
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Affiliation(s)
- Kai Quan
- Department of Neurosurgery, National Center for Neurological Disorders, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Neurosurgical Institute of Fudan University, Shanghai, 200040, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, 200040, China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, 200040, China
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences (CAMS), Shanghai, 200040, China
| | - Xuanfeng Qin
- Department of Neurosurgery, National Center for Neurological Disorders, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Neurosurgical Institute of Fudan University, Shanghai, 200040, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, 200040, China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, 200040, China
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences (CAMS), Shanghai, 200040, China
| | - Jianping Song
- Department of Neurosurgery, National Center for Neurological Disorders, Huashan Hospital, Fudan University, Shanghai, 200040, China.
- Neurosurgical Institute of Fudan University, Shanghai, 200040, China.
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, 200040, China.
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, 200040, China.
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences (CAMS), Shanghai, 200040, China.
- Department of Neurosurgery, National Regional Medical Center, Huashan Hospital Fujian Campus, Fudan University, Fuzhou, 350209, Fujian, China.
| | - Wei Zhu
- Department of Neurosurgery, National Center for Neurological Disorders, Huashan Hospital, Fudan University, Shanghai, 200040, China
- Neurosurgical Institute of Fudan University, Shanghai, 200040, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, 200040, China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, 200040, China
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences (CAMS), Shanghai, 200040, China
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25
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Wang P, Jiang Y, Hoptman MJ, Li Y, Cao Q, Shah P, Klugah-Brown B, Biswal BB. Structural-functional connectivity deficits of callosal-white matter-cortical circuits in schizophrenia. Psychiatry Res 2023; 330:115559. [PMID: 37931478 DOI: 10.1016/j.psychres.2023.115559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/18/2023] [Accepted: 10/21/2023] [Indexed: 11/08/2023]
Abstract
Schizophrenia is increasingly recognized as a disorder with altered integration between large-scale functional networks and cortical-subcortical pathways. This spatial long-distance information communication must be associated with white matter (WM) fiber bundles. With accumulating evidence that WM functional signals reflect the intrinsic neural activities, how the deep callosal organization modulates cortical functional activities through WM remains unclear in schizophrenia. Using a data-driven method, we identified nine WM and gray matter (GM) functional networks, and then parcellated corpus callosum into distinct sub-regions. Combining functional connectivity and fiber tracking analysis, we estimated the structural and functional connectivity changes of callosal-WM-cortical circuits in schizophrenia. We observed higher structural and functional connectivity between corpus callosum, WM and GM functional networks involving visual network (visual processing), executive control network (executive controls), ventral attention network (processing of salience), and limbic network (emotion processing) in schizophrenia compared to healthy controls. We also found nine abnormal pathways of callosal-WM-cortical circuits involving the above networks and default mode network (self-related thought). These results highlight the role of connectivity deficits in callosal-WM-cortical circuits may play in understanding the delusions, hallucinations and cognitive impairment of schizophrenia.
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Affiliation(s)
- Pan Wang
- MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, The Clinical Hospital of Chengdu Brain Science Institute, University of Electronic Science and Technology of China, Chengdu, China.
| | - Yuan Jiang
- MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, The Clinical Hospital of Chengdu Brain Science Institute, University of Electronic Science and Technology of China, Chengdu, China
| | - Matthew J Hoptman
- Division of Clinical Research, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA; Department of Psychiatry, NYU Grossman School of Medicine, New York, NY 10016, USA
| | - Yilu Li
- MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, The Clinical Hospital of Chengdu Brain Science Institute, University of Electronic Science and Technology of China, Chengdu, China
| | - Qingquan Cao
- MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, The Clinical Hospital of Chengdu Brain Science Institute, University of Electronic Science and Technology of China, Chengdu, China
| | - Pushti Shah
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
| | - Benjamin Klugah-Brown
- MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, The Clinical Hospital of Chengdu Brain Science Institute, University of Electronic Science and Technology of China, Chengdu, China.
| | - Bharat B Biswal
- MOE Key Laboratory for Neuroinformation, Center for Information in Medicine, School of Life Science and Technology, The Clinical Hospital of Chengdu Brain Science Institute, University of Electronic Science and Technology of China, Chengdu, China; Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.
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26
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KL V, Anusha SR, K Muthaiah P, BS HJ. Insights into morphometry and topography of corpus callosum among Indians. Bioinformation 2023; 19:1063-1066. [PMID: 38046518 PMCID: PMC10692978 DOI: 10.6026/973206300191063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/30/2023] [Accepted: 11/30/2023] [Indexed: 12/05/2023] Open
Abstract
Corpus callosum is one of the major association fibre of brain performs an integral role of integration and communication of information between the two hemispheres. 50 formalin fixed cerebral hemispheres (25 right and 25 left) were used for the study. The longitudinal and vertical length of brain, longitudinal length and height of corpus callosum, distance of corpus callosum from various landmarks such as frontal and occipital pole, anterior commissure, lamina terminalis, and highest point on parietal pole and width of different parts of corpus callosum and height were measured. Results were analysed statistically. The results showed positive correlation between the longitudinal dimension of brain and all other parameters. Morphometric variation in size and its relation to nearby structures are seen in many neurological and psychiatric conditions such as Alzheimer's disease, Schizophrenia and bipolar disorders. Hence the present study can be used as reference by neurologist, neurosurgeons and psychiatrists.
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Affiliation(s)
- Varalakshmi KL
- Department of Anatomy, MVJ Medical College and Research Hospital, Hoskote, Bangalore; India
| | - SR Anusha
- Department of Anatomy, MVJ Medical College and Research Hospital, Hoskote, Bangalore; India
| | - Prajwal K Muthaiah
- Department of Anatomy, MVJ Medical College and Research Hospital, Hoskote, Bangalore; India
| | - Harshini Jain BS
- Department of Anatomy, MVJ Medical College and Research Hospital, Hoskote, Bangalore; India
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27
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Zheng S, Lin Q, Zhang M, Liu H, He Y, Lu J. Secondary Degeneration of White Matter Tract following Basal Ganglia Infarction: A Longitudinal Diffusion Tensor Imaging Study. Curr Med Imaging 2023; 20:CMIR-EPUB-136384. [PMID: 38031789 DOI: 10.2174/0115734056247080231116111402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 09/12/2023] [Accepted: 09/25/2023] [Indexed: 12/01/2023]
Abstract
INTRODUCTION We explored the relationship between secondary degeneration of white matter (WM) tracts and motor outcomes after left basal ganglia infarction and investigated alterations in the diffusion indices of WM tracts in distal areas. METHODS Clinical neurological evaluations were accomplished using the Fugl-Meyer scale (FMS). Then, the fractional anisotropy (FA) of the bilateral superior corona radiata (SCR), cerebral peduncle (CP), corticospinal tracts (CST), and corpus callosum (CC) were measured in all patients and control subjects. RESULTS Regional-based analysis revealed decreased FA values in the ipsilesional SCR, CP, and CST of the patients, compared to the control subjects at 5- time points. The relative FA (rFA) values of the SCR, CP, and CST decreased progressively with time, the lowest values recorded at 90 days before increasing slightly at 180 days after stroke. Compared to the contralateral areas, the FA values of the ipsilesional SCR and CST areas were significantly decreased (P=0.023), while those of the CP decreased at 180 days (P=0.008). Compared with the values at 7 days, the rFA values of the ipsilesional SCR and CP areas were significantly reduced at 14, 30, and 90 days, while those in the CST area were significantly reduced at 14, 90, and 180 days. The CP rFA value at 7 days correlated positively with the FM scores at 180 days (r=0.469, P=0.037). CONCLUSION This study provides an objective, comprehensive, and automated protocol for detecting secondary degeneration of WM, which is important in understanding rehabilitation mechanisms after stroke.
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Affiliation(s)
- Shasha Zheng
- Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
- Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing 100053, China
- Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing 100053, China
| | - Qixiang Lin
- State Key Laboratory for Cognitive Neuroscience and Learning and IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
- Department of Neurology, School of Medicine, Emory University, USA
| | - Miao Zhang
- Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
- Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing 100053, China
| | - Hesheng Liu
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology and Department of Psychiatry, Massachusetts General Hospital, Charlestown, MA 02129, USA
| | - Yong He
- State Key Laboratory for Cognitive Neuroscience and Learning and IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China
| | - Jie Lu
- Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
- Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing 100053, China
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Waack A, Nandwani S, Ranabothu M, Ranabothu A, Vattipally V. Marchiafava-Bignami disease: Case presentation and radiological imaging. Radiol Case Rep 2023; 18:3922-3925. [PMID: 37663564 PMCID: PMC10473971 DOI: 10.1016/j.radcr.2023.08.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 09/05/2023] Open
Abstract
Marchiafava-Bignami disease (MBD) is a rare vitamin B deficiency classically associated with alcoholism. MBD damages the corpus callosum and presents with nonspecific neurological symptoms. Radiological imaging is critical for diagnosing MBD and commencing subsequent treatment, which often consists of vitamin B supplementation. We present a case of MBD in a 56-year-old male with alcohol use disorder, epilepsy, schizophrenia, post-traumatic stress disorder, and cardiovascular risk factors. The patient presented with general neurological symptoms, and there were several potential diagnoses to consider based on the patient's history. Radiological imaging was necessary for diagnosis. This case demonstrates the role radiological imaging plays in the workup of MBD.
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Affiliation(s)
- Andrew Waack
- University of Toledo College of Medicine and Life Sciences, 3000 Arlington Ave, Toledo, OH 43614 United States
| | - Swamroop Nandwani
- University of Toledo College of Medicine and Life Sciences, 3000 Arlington Ave, Toledo, OH 43614 United States
| | - Meghana Ranabothu
- University of Toledo College of Medicine and Life Sciences, 3000 Arlington Ave, Toledo, OH 43614 United States
| | - Akash Ranabothu
- Grand Valley State University College of Liberal Arts and Sciences, Mackinac Hall (MAK), 1 N Campus Dr, Allendale, MI 49401 United States
| | - Venkatramana Vattipally
- Advanced Radiology Services, P.C.3264 North Evergreen Drive NE, Grand Rapids, MI 49525 United States
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29
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Guner YE, Comert A, Aslan A, Gungor Y. Corpus callosum area and sectioning: a radioanatomical study correlated with MRI and cadaver morphometry. Surg Radiol Anat 2023; 45:1427-1433. [PMID: 37488413 DOI: 10.1007/s00276-023-03206-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 07/05/2023] [Indexed: 07/26/2023]
Abstract
PURPOSE The corpus callosum (CC) is the primary interhemispheric connection between the two cerebral hemispheres. Besides their similar morphological characters, there are differences in their measurements. This study aimed to divide the CC into groups using planes based on the anterior commissure (AC) and posterior commissure (PC) and to detect differences in CC magnetic resonance imaging (MRI) and cadaver samples between these groups. METHODS The study included 80 patients (40 male and 40 female patients) who underwent normal MRI in the midsagittal plane, and 38 cerebral hemispheres from 40 adult cadaver brains, with each hemisected in the midsagittal plane. The medial surface of the CC was divided vertically into three parts (the anterior, middle, and posterior zones) according to the AC and PC. Areas and parameters were measured in both the cadaveric hemispheres and patient MRI images. RESULTS The total CC area and CC areas between, anterior, and posterior to the AC-PC vertical lines were the same in both the MRI and cadaver samples. In addition, morphometric measurements like the CC length, AC-PC length, and CC height at the AC and PC vertical lines, and their correlations were also found to be similar between the MRI and cadaver samples. CONCLUSION This study proposes three areas according to AC and PC classification (anterior, middle, and posterior). This new proposed classification is suitable for stereotactic interventions and is useful for obtaining data from MRI images. However, it should be kept in mind that there may be changes and variations.
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Affiliation(s)
- Yahya Efe Guner
- Department of Neurosurgery, School of Medicine, Yuksek Ihtisas University, Ankara, Turkey
| | - Ayhan Comert
- Department of Anatomy, School of Medicine, Ankara University, Ankara, Turkey.
| | - Aydın Aslan
- Department of Radiology, School of Medicine, Yuksek Ihtisas University, Ankara, Turkey
| | - Yigit Gungor
- Department of Anatomy, School of Medicine, Ankara University, Ankara, Turkey
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30
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Wu GR, Baeken C. Normative modeling analysis reveals corpus callosum volume changes in early and mid-to-late first episode major depression. J Affect Disord 2023; 340:10-16. [PMID: 37499915 DOI: 10.1016/j.jad.2023.07.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/19/2023] [Accepted: 07/23/2023] [Indexed: 07/29/2023]
Abstract
BACKGROUND It has been widely accepted that major depressive disorder (MDD) impacts brain structures including the Corpus Callosum (CC). However, this assumption is based on scarce literature data involving small sample sizes. Furthermore, it is still unclear whether such CC volume changes may already be present at a first depressive episode. METHODS To further investigate this question, we compared 369 first-episode MDD patients (mean age = 35 years (sd = 12), 249 females; 283 early onset, 86 mid-to-late onset) from the open-source REST meta-MDD database closely matched for age and gender to 490 never-depressed individuals (mean age = 37 years (sd = 14); 309 females) using Z-scores obtained from normative neuroanatomical modeling to assess individual variability in CC (sub)volumes. RESULTS Relative to the norms established by the healthy controls, first-episode MDD patients displayed CC volume (z-score) reductions in the entire CC (including the body), as did mid-to-late-onset first-episode MDD patients (age ≥ 45 y). In early-onset first-episode MDD patients (age ≤ 44 y), depression severity symptoms were related to volume increases in the entire CC, as well as the body and splenium. LIMITATIONS No data on depressive episode duration. Relatively small sample size for mid-to-late first-episode MDD patients. CONCLUSIONS Our data revealed CC (sub)volume differences in early versus mid-to-late onset first episode MDD. Especially at early onset, depression severity may result in neural white matter activity as potential reaction to stress influences. Our results underline the importance of prompt clinical interventions at early onset MDD.
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Affiliation(s)
- Guo-Rong Wu
- Key Laboratory of Cognition and Personality, Faculty of Psychology, Southwest University, Chongqing, China; Faculty of Medicine and Health Sciences, Department of Head and Skin, Ghent Experimental Psychiatry (GHEP) lab, Ghent University, Ghent, Belgium.
| | - Chris Baeken
- Faculty of Medicine and Health Sciences, Department of Head and Skin, Ghent Experimental Psychiatry (GHEP) lab, Ghent University, Ghent, Belgium; Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Department of Psychiatry, Laarbeeklaan 101, 1090 Brussels, Belgium; Eindhoven University of Technology, Department of Electrical Engineering, Eindhoven, the Netherlands
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Mandine N, Tavernier E, Hülnhagen T, Maréchal B, Kober T, Tauber C, Guichard M, Castelnau P, Morel B. Corpus callosum in children with neurodevelopmental delay: MRI standard qualitative assessment versus automatic quantitative analysis. Eur Radiol Exp 2023; 7:61. [PMID: 37833469 PMCID: PMC10575841 DOI: 10.1186/s41747-023-00375-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 08/07/2023] [Indexed: 10/15/2023] Open
Abstract
BACKGROUND The corpus callosum (CC) is a key brain structure. In children with neurodevelopmental delay, we compared standard qualitative radiological assessments with an automatic quantitative tool. METHODS We prospectively enrolled 73 children (46 males, 63.0%) with neurodevelopmental delay at single university hospital between September 2020 and September 2022. All of them underwent 1.5-T brain magnetic resonance imaging (MRI) including a magnetization-prepared 2 rapid acquisition gradient echoes - MP2RAGE sequence. Two radiologists blindly reviewed the images to classify qualitatively the CC into normal, hypoplasic, hyperplasic, and/or dysgenetic classes. An automatic tool (QuantiFIRE) was used to provide brain volumetry and T1 relaxometry automatically as well as deviations of those parameters compared with a healthy age-matched cohort. The MRI reference standard for CC volumetry was based on the Garel et al. study. Cohen κ statistics was used for interrater agreement. The radiologists and QuantiFIRE's diagnostic accuracy were compared with the reference standard using the Delong test. RESULTS The CC was normal in 42 cases (57.5%), hypoplastic in 20 cases (27.4%), and hypertrophic in 11 cases (15.1%). T1 relaxometry values were abnormal in 26 children (35.6%); either abnormally high (18 cases, 24.6%) or low (8 cases, 11.0%). The interrater Cohen κ coefficient was 0.91. The diagnostic accuracy of the QuantiFIRE prototype was higher than that of the radiologists for hypoplastic and normal CC (p = 0.003 for both subgroups, Delong test). CONCLUSIONS An automated volumetric and relaxometric assessment can assist the evaluation of brain structure such as the CC, particularly in the case of subtle abnormalities. RELEVANCE STATEMENT Automated brain MRI segmentation combined with statistical comparison to normal volume and T1 relaxometry values can be a useful diagnostic support tool for radiologists. KEY POINTS • Corpus callosum abnormality detection is challenging but clinically relevant. • Automated quantitative volumetric analysis had a higher diagnostic accuracy than that of visual appreciation of radiologists. • Quantitative T1 relaxometric analysis might help characterizing corpus callosum better.
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Affiliation(s)
- Natacha Mandine
- Pediatric Radiology Department, CHRU of Tours, Clocheville Hospital, Tours, France
| | - Elsa Tavernier
- Clinical Investigation Center, INSERM 1415, CHRU Tours, Tours, France
| | - Till Hülnhagen
- Advanced Clinical Imaging Technology, Siemens Healthineers International, Lausanne, Switzerland
- Department of Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- LTS5, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Bénédicte Maréchal
- Advanced Clinical Imaging Technology, Siemens Healthineers International, Lausanne, Switzerland
- Department of Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- LTS5, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Tobias Kober
- Advanced Clinical Imaging Technology, Siemens Healthineers International, Lausanne, Switzerland
- Department of Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- LTS5, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Clovis Tauber
- UMR 1253, iBrain, Université de Tours, Inserm, Tours, France
| | - Marine Guichard
- Pediatric Neurology Department, CHRU of Tours, Clocheville Hospital, Tours, France
| | - Pierre Castelnau
- Pediatric Neurology Department, CHRU of Tours, Clocheville Hospital, Tours, France
| | - Baptiste Morel
- Pediatric Radiology Department, CHRU of Tours, Clocheville Hospital, Tours, France.
- UMR 1253, iBrain, Université de Tours, Inserm, Tours, France.
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Westerhausen R, Fabri M, Hausmann M. Dichotic-listening performance after complete callosotomy: No relief from left-ear extinction by selective attention. Neuropsychologia 2023; 188:108627. [PMID: 37348649 DOI: 10.1016/j.neuropsychologia.2023.108627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/01/2023] [Accepted: 06/19/2023] [Indexed: 06/24/2023]
Abstract
The surgical section of the corpus callosum (callosotomy) has been frequently demonstrated to result in a left-ear extinction in dichotic listening. That is, callosotomy patients report the left-ear stimulus below chance level, resulting in substantially enhanced right-ear advantage (REA) compared with controls. A small number of previous studies also suggest that callosotomy patients can overcome left-ear extinction when the instruction encourages to attend selectively to the left-ear stimulus. In the present case study, we re-examine the role of selective attention in dichotic listening in two patients with complete callosotomy and 40 age- and sex-matched controls. We used the standardised Bergen dichotic-listening paradigm which uses stop-consonant-vowel syllables as stimulus material and includes both a free-report and selective-attention condition. As was predicted, both patients showed a clear left-ear extinction. However, contrasting the earlier reports, we did not find any evidence for a relief from this extinction by selectively attending to the left-ear stimulus. We conclude that previous demonstrations of an attention-improved left-ear recall in callosotomy patients may be attributed to the use of suboptimal dichotic paradigms or residual callosal connectivity, rather than representing a genuine effect of attention.
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Affiliation(s)
| | - Mara Fabri
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Markus Hausmann
- Department of Psychology, Durham University, Durham, United Kingdom
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Sinha S, Avnon A, Perera A, Lavrador JP, Ashkan K. Butterfly gliomas: a time for stratified management? Neurosurg Rev 2023; 46:223. [PMID: 37665387 PMCID: PMC10477135 DOI: 10.1007/s10143-023-02126-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 06/16/2023] [Accepted: 08/23/2023] [Indexed: 09/05/2023]
Abstract
Butterfly glioblastomas (bGBM) are a rare subset of WHO grade IV tumours that carry a poor prognosis with a median survival ranging between 3.3 to 6 months. Given their poor prognosis, there is debate over whether histological diagnosis with a biopsy or any surgical or oncological intervention alters disease progression. With this in mind, we reviewed our experience as a high-volume unit to evaluate management decisions and outcomes. A retrospective analysis was undertaken (January 2009 to June 2021) of the electronic patient records of a large neurosurgical centre. We assessed patient demographics, initial clinical presentation, tumour characteristics, clinical management and overall survival (Kaplan-Meier estimator, log-rank analysis and cox proportional hazard analysis). Eighty cases of bGBM were identified. These patients were managed with biopsy ± adjuvant therapy (36), with radiotherapy alone without biopsy (3), or through surgical resection (3). Thirty-eight cases of suspected bGBM were managed conservatively, receiving no oncological treatment or surgical resection/biopsy for histological diagnosis. Those managed conservatively and with radiotherapy without biopsy were diagnosed at neuro-oncology multidisciplinary meeting (MDT) based on clinical presentation and radiological imaging. No significant difference in survival was seen between conservative management compared with single adjuvant treatment (p = 0.69). However, survival was significantly increased when patients received dual adjuvant chemoradiotherapy following biopsy or resection (p = 0.002). A Cox Proportional Hazards model found that survival was significantly impacted by the oncology treatment (p < 0.001), but was not significantly related to potential confounding variables such as the patient's age (p = 0.887) or KPS (p = 0.057). Butterfly glioblastoma have a poor prognosis. Our study would suggest that unless a patient is planned for adjuvant chemoradiotherapy following biopsy, they should be managed conservatively. This avoids unnecessary procedural interventions with the associated morbidities and costs.
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Affiliation(s)
- Siddharth Sinha
- Department of Neurosurgery, King's College Hospital NHS Foundation Trust, London, UK.
| | - Adam Avnon
- Department of Neurosurgery, King's College Hospital NHS Foundation Trust, London, UK
| | - Andrea Perera
- Department of Neurosurgery, King's College Hospital NHS Foundation Trust, London, UK
- Maurice Wohl institute, Kings College London, London, UK
| | - Jose Pedro Lavrador
- Department of Neurosurgery, King's College Hospital NHS Foundation Trust, London, UK
| | - Keyoumars Ashkan
- Department of Neurosurgery, King's College Hospital NHS Foundation Trust, London, UK
- Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
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Akbas H, Guven ESG, Guven S, Kizilirmak R, Albayrak M, Aydogan Z, Kul S. Evaluation of the height of the corpus callosum body region in fetal meningomyelocele malformation. J Gynecol Obstet Hum Reprod 2023; 52:102619. [PMID: 37295771 DOI: 10.1016/j.jogoh.2023.102619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 05/26/2023] [Accepted: 06/06/2023] [Indexed: 06/12/2023]
Abstract
PURPOSE To investigate height of the corpus callosum (CC) in order to describe the corpus callosum anomalies in fetuses with meningomyelocele (MMC) and compare these findings with the corpus callosum of healthy fetuses. METHODS In this study, fetal MRI examinations were performed on 44 fetal MMC malformation cases. As the control group, 34 fetal MRI examinations, which were anatomically normal, were evaluated retrospectively. In the study group, lateral ventricle diameter, the level and diameter of the MMC defect, and CC height were measured. In the control group, CC height and lateral ventricular diameter were measured. RESULTS The mean CC body height was 1.36 mm in the study group, and 2.48 mm in the control group. The height of the CC body region of the study population was inclined to be thinner compared with the control population (p<0.001). CONCLUSIONS The fact that the height of the CC body region was found to be thinner in fetal MRI in cases of MMC compared with normal fetuses suggests that various callosal anomalies are uncertain, investigation of additional callosal anomalies may be beneficial in the decision for the continuation of pregnancy, and termination or intrauterine surgery in cases with MMC. Further large case group studies are needed.
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Affiliation(s)
- Humeyra Akbas
- Department of Perinatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey.
| | | | - Suleyman Guven
- Department of Gynecology and Obstetrics, Karadeniz Technical University School of Medicine, Trabzon, Turkey
| | - Rukiye Kizilirmak
- Department of Perinatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Mehmet Albayrak
- Department of Perinatology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Zeynep Aydogan
- Department of Radiology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
| | - Sibel Kul
- Department of Radiology, Karadeniz Technical University Faculty of Medicine, Trabzon, Turkey
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Saghir K, Chraa M, Kissani N, Joulal H, Essaadouni L, Louhab N. Anti-MDA5 antibody-positive dermatomyositis with mild encephalopathy with reversible splenial lesion: a possible rare association? Wien Med Wochenschr 2023; 173:263-266. [PMID: 35729459 PMCID: PMC9211780 DOI: 10.1007/s10354-022-00943-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 05/25/2022] [Indexed: 12/01/2022]
Abstract
Central nervous system (CNS) involvement in dermatomyositis (DM) is seldom observed. However, there are very rare case reports of CNS involvement with juvenile dermatomyositis. Encephalopathy in DM may occur for a number of reasons, such as cerebral vasculitis and hypoperfusion/hypertensive encephalopathy, but mostly as a consequence of immunosuppressant treatment. We report here for the first time the case of a patient with two rare diseases, namely anti-MDA5 antibody-positive dermatomyositis and mild encephalopathy with reversible splenial lesion (MERS).
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Affiliation(s)
- Khadija Saghir
- Neuroscience Research Laboratory, Marrakech Medical School, Cadi Ayyad University, Marrakech, Morocco.
- Department of Neurology, University Teaching Hospital Mohammed VI, Marrakesh, Morocco.
- Faculty of Medicine, Cadi Ayyad. Department of Internal Medicine, University Teaching Hospital Mohammed VI, Marrakesh, Morocco.
| | - Mohammed Chraa
- Neuroscience Research Laboratory, Marrakech Medical School, Cadi Ayyad University, Marrakech, Morocco
- Department of Neurology, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
- Faculty of Medicine, Cadi Ayyad. Department of Internal Medicine, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
| | - Najib Kissani
- Neuroscience Research Laboratory, Marrakech Medical School, Cadi Ayyad University, Marrakech, Morocco
- Department of Neurology, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
- Faculty of Medicine, Cadi Ayyad. Department of Internal Medicine, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
| | - Hajar Joulal
- Neuroscience Research Laboratory, Marrakech Medical School, Cadi Ayyad University, Marrakech, Morocco
- Department of Neurology, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
- Faculty of Medicine, Cadi Ayyad. Department of Internal Medicine, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
| | - Lamiaa Essaadouni
- Neuroscience Research Laboratory, Marrakech Medical School, Cadi Ayyad University, Marrakech, Morocco
- Department of Neurology, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
- Faculty of Medicine, Cadi Ayyad. Department of Internal Medicine, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
| | - Nissrine Louhab
- Neuroscience Research Laboratory, Marrakech Medical School, Cadi Ayyad University, Marrakech, Morocco
- Department of Neurology, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
- Faculty of Medicine, Cadi Ayyad. Department of Internal Medicine, University Teaching Hospital Mohammed VI, Marrakesh, Morocco
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Namli MN, Baykara S, Baykara M, Balcioglu YH. Statistical shape analysis of corpus callosum in delusional disorder. Psychiatry Res Neuroimaging 2023; 334:111695. [PMID: 37567087 DOI: 10.1016/j.pscychresns.2023.111695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 07/02/2023] [Accepted: 07/23/2023] [Indexed: 08/13/2023]
Abstract
Neurobiological foundations of delusional disorder (DD) have been studied less with neuroimaging techniques when compared to other psychotic disorders. The present study aimed to delineate the neural substrates of DD by investigating neuroanatomical characteristics of the corpus callosum (CC) with statistical shape analysis (SSA) conducted on magnetic resonance images (MRI). Twenty (female:male=1:1) DSM-5 DD patients and 20 age- and gender-matched healthy individuals were included. High-resolution 3D T1 Turbo Field Echo MRI images were scanned with a 1.5 T MR device. The landmarks that were selected to determine the shape differences in CC were identified based on previous studies. Furthermore, constructed landmarks were determined and employed to better assess regional shape differences. There was no significant difference in the CC area in the mid-sagittal images between the DD patients and controls. However, DD patients exhibited a pattern of structural CC changes in various regions. The study findings emphasizes the variable subregional nature of CC in DD patients. Future SSA studies with larger samples could shed further light on DD etiology, diagnosis, classification and treatment options.
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Affiliation(s)
- Mustafa Nuray Namli
- Department of Psychiatry, Hamidiye Faculty of Medicine, Saglik Bilimleri University, Istanbul, Turkiye; Department of Psychiatry, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkiye
| | - Sema Baykara
- Department of Psychiatry, Faculty of Medicine, Firat University, Elazig, Turkiye; Department of Psychiatry, Erenkoy Psychiatry and Neurology Training and Research Hospital, Istanbul, Turkiye
| | - Murat Baykara
- Department of Radiology, Faculty of Medicine, Firat University, Elazig, Turkiye; Department of Radiology, Haydarpasa Numune Training and Research Hospital, Istanbul, Turkiye
| | - Yasin Hasan Balcioglu
- Department of Psychiatry, Forensic Psychiatry Unit, Bakirkoy Prof Mazhar Osman Training and Research Hospital for Psychiatry Neurology, and Neurosurgery, Istanbul, Turkiye.
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Campbell ML, Dalvie S, Shadrin A, van der Meer D, O'Connell K, Frei O, Andreassen OA, Stein DJ, Rokicki J. Distributed genetic effects of the corpus callosum subregions suggest links to neuropsychiatric disorders and related traits. Acta Neuropsychiatr 2023:1-8. [PMID: 37612147 PMCID: PMC10891296 DOI: 10.1017/neu.2023.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
BACKGROUND The corpus callosum (CC) is a brain structure with a high heritability and potential role in psychiatric disorders. However, the genetic architecture of the CC and the genetic link with psychiatric disorders remain largely unclear. We investigated the genetic architectures of the volume of the CC and its subregions and the genetic overlap with psychiatric disorders. METHODS We applied multivariate genome-wide association study (GWAS) to genetic and T1-weighted magnetic resonance imaging (MRI) data of 40,894 individuals from the UK Biobank, aiming to boost genetic discovery and to assess the pleiotropic effects across volumes of the five subregions of the CC (posterior, mid-posterior, central, mid-anterior and anterior) obtained by FreeSurfer 7.1. Multivariate GWAS was run combining all subregions, co-varying for relevant variables. Gene-set enrichment analyses were performed using MAGMA. Linkage disequilibrium score regression (LDSC) was used to determine Single nucleotide polymorphism (SNP)-based heritability of total CC volume and volumes of its subregions as well as their genetic correlations with relevant psychiatric traits. RESULTS We identified 70 independent loci with distributed effects across the five subregions of the CC (p < 5 × 10-8). Additionally, we identified 33 significant loci in the anterior subregion, 23 in the mid-anterior, 29 in the central, 7 in the mid-posterior and 56 in the posterior subregion. Gene-set analysis revealed 156 significant genes contributing to volume of the CC subregions (p < 2.6 × 10-6). LDSC estimated the heritability of CC to (h2SNP = 0.38, SE = 0.03) and subregions ranging from 0.22 (SE = 0.02) to 0.37 (SE = 0.03). We found significant genetic correlations of total CC volume with bipolar disorder (BD, rg = -0.09, SE = 0.03; p = 5.9 × 10-3) and drinks consumed per week (rg = -0.09, SE = 0.02; p = 4.8 × 10-4), and volume of the mid-anterior subregion with BD (rg = -0.12, SE = 0.02; p = 2.5 × 10-4), major depressive disorder (MDD) (rg = -0.12, SE = 0.04; p = 3.6 × 10-3), drinks consumed per week (rg = -0.13, SE = 0.04; p = 1.8 × 10-3) and cannabis use (rg = -0.09, SE = 0.03; p = 8.4 × 10-3). CONCLUSIONS Our results demonstrate that the CC has a polygenic architecture implicating multiple genes and show that CC subregion volumes are heritable. We found that distinct genetic factors are involved in the development of anterior and posterior subregions, consistent with their divergent functional specialisation. Significant genetic correlation between volumes of the CC and BD, drinks per week, MDD and cannabis consumption subregion volumes with psychiatric traits is noteworthy and deserving of further investigation.
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Affiliation(s)
- Megan L Campbell
- Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
- Global Initiative for Neuropsychiatric Genetics Education in Research (GINGER), Harvard, T.H. Chan School of Public Health, Boston, MA, USA
| | - Shareefa Dalvie
- Division of Human Genetics, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Alexey Shadrin
- NORMENT Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo, and Oslo University Hospital, Oslo, Norway
| | - Dennis van der Meer
- NORMENT Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo, and Oslo University Hospital, Oslo, Norway
- School of Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, Netherlands
| | - Kevin O'Connell
- NORMENT Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo, and Oslo University Hospital, Oslo, Norway
| | - Oleksander Frei
- NORMENT Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo, and Oslo University Hospital, Oslo, Norway
| | - Ole A Andreassen
- NORMENT Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo, and Oslo University Hospital, Oslo, Norway
| | - Dan J Stein
- Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
| | - Jaroslav Rokicki
- NORMENT Centre for Psychosis Research, Division of Mental Health and Addiction, University of Oslo, and Oslo University Hospital, Oslo, Norway
- Centre of Research and Education in Forensic Psychiatry (SIFER), Oslo University Hospital, Oslo, Norway
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Duque ACM, Cuesta TAC, Melo ADS, Lima Maldonado I. Right hemisphere and metaphor comprehension: A connectionist perspective. Neuropsychologia 2023; 187:108618. [PMID: 37321404 DOI: 10.1016/j.neuropsychologia.2023.108618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 04/11/2023] [Accepted: 06/10/2023] [Indexed: 06/17/2023]
Abstract
Metaphor comprehension is a cognitively complex task, with evidence pointing to the engagement of multiple cerebral areas. In addition, the involvement of the right hemisphere appears to vary with cognitive effort. Therefore, the interconnecting pathways of such distributed cortical centers should be taken into account when studying this topic. Despite this, the potential contribution of white matter fasciculi has received very little attention in the literature to date and is not mentioned in most metaphor comprehension studies. To highlight the probable implications of the right inferior fronto-occipital fasciculus, right superior longitudinal system, and callosal radiations, we bring together findings from different research fields. The aim is to describe important insights enabled by the cross-fertilization of functional neuroimaging, clinical findings, and structural connectivity.
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Affiliation(s)
- Anna Clara Mota Duque
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Taryn Ariadna Castro Cuesta
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Ailton de Souza Melo
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Igor Lima Maldonado
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Dep. Biomorfologia, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador, Brazil; UMR 1253, iBrain, Université de Tours, Inserm, Tours, France.
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Sato H, Lepić M, Suzuki K, Tabata S, Tamada K, Kume H, Shiwaku H, Ooigawa H, Kurita H. Reversible splenial lesion after surgery for distant arteriovenous malformation: a case report. Acta Neurochir (Wien) 2023; 165:1603-1607. [PMID: 37055680 PMCID: PMC10101539 DOI: 10.1007/s00701-023-05573-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 03/29/2023] [Indexed: 04/15/2023]
Abstract
Isolated lesions of the corpus callosum are rare and may represent permanent but also transient responses to various pathology termed "reversible splenial lesion syndrome" (RESLES) when in light of relevant clinical presentation. We present the first case of the RESLES after elective surgery for distant arteriovenous malformation (AVM), followed by a slight speech disturbance and MRI verified small, oval, well-circumscribed area of apparent cytotoxic edema in the center of the corpus callosum splenium, which completely resolved within 15 days. Surgery for AVM is followed by the complex adaptation to a new vascular pattern, RESLES might develop, and should be suspected.
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Affiliation(s)
- Hiroki Sato
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan.
| | - Milan Lepić
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
| | - Kaima Suzuki
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
| | - Shinya Tabata
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
| | - Keita Tamada
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
| | - Haruka Kume
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
| | - Hiroya Shiwaku
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
| | - Hidetoshi Ooigawa
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
| | - Hiroki Kurita
- Department of Cerebrovascular Surgery, International Medical Center, Saitama Medical University, 1397-1 Yamane, Hidaka-shi, Saitama-ken, Japan
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Demir A, Rosas HD. Exploring interhemispheric connectivity using the directional tract density patterns of the corpus callosum. Neuroimage Rep 2023; 3:100174. [PMID: 37388455 PMCID: PMC10310067 DOI: 10.1016/j.ynirp.2023.100174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
The corpus callosum (CC) is one of the most important interhemispheric white matter tracts that connects interrelated regions of the cerebral cortex. Its disruption has been investigated in previous studies and has been found to play an important role in several neurodegenerative disorders. Currently available methods to assess the interhemispheric connectivity of the CC have several limitations: i) they require the a priori identification of specific cortical regions as targets or seeds, ii) they are limited by the characterization of only small components of the structure, primarily voxels that constitute the mid-sagittal slice, and iii) they use global measures of microstructural integrity, which provide only limited characterization. In order to address some of these limitations, we developed a novel method that enables the characterization of white matter tracts covering the structure of CC, from the mid-sagittal plane to corresponding regions of cortex, using directional tract density patterns (dTDPs). We demonstrate that different regions of CC have distinctive dTDPs that reflect a unique regional topology. We conducted a pilot study using this approach to evaluate two different datasets collected from healthy subjects, and we demonstrate that this method is reliable, reproducible, and independent of diffusion acquisition parameters, suggesting its potential applicability to clinical applications.
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Affiliation(s)
- Ali Demir
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - H. Diana Rosas
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
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Angelova P, Kehayov I, Ordonez-Rubiano EG, Figueredo LF, Zlatareva D. Long-term Tractography Evaluation of Corpus Callosum Impairment After Severe Traumatic Brain Injury in Patients With Isolated Intraventricular Hemorrhage on Admission CT: Two Illustrative Cases and a Literature Review. Korean J Neurotrauma 2023; 19:249-257. [PMID: 37431372 PMCID: PMC10329887 DOI: 10.13004/kjnt.2023.19.e27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/20/2023] [Accepted: 04/08/2023] [Indexed: 07/12/2023] Open
Abstract
Severe traumatic brain injury (TBI) is often associated with diffuse axonal injury. Diffuse axonal injury affecting the corpus callosum may present with intraventricular hemorrhage on baseline computed tomography (CT) scan. Posttraumatic corpus callosum damage is a chronic condition that can be diagnosed over the long term using various magnetic resonance imaging (MRI) sequences. Here, we present two cases of severe survivors of TBI with isolated intraventricular hemorrhage detected on an initial CT scan. After acute trauma management, long-term follow-up was performed. Diffusion tensor imaging and subsequent tractography revealed a significant decrease in the fractional anisotropy values and the number of corpus callosum fibers compared with those in healthy control patients. This study presents a possible correlation between traumatic intraventricular hemorrhage on admission CT and long-term corpus callosum impairment detected on MRI in patients with severe head injury by presenting demonstrative cases and conducting a literature review.
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Affiliation(s)
- Polina Angelova
- Department of Neurosurgery, Faculty of Medicine, Medical University of Plovdiv, Plovdiv, Bulgaria
| | - Ivo Kehayov
- Department of Neurosurgery, Faculty of Medicine, Medical University of Plovdiv, Plovdiv, Bulgaria
| | - Edgar G. Ordonez-Rubiano
- Department of Neurosurgery, Hospital de San José – Sociedad de Cirugía de Bogotá, Fundación Universitaria de Ciencias de la Salud, Bogotá D.C., Colombia
| | - Luisa F. Figueredo
- Department of Psychiatry, NYU Grossman School of Medicine, New York, NY, USA
| | - Dora Zlatareva
- Department of Diagnostic Imaging, Medical University of Sofia, Sofia, Bulgaria
- Research Complex for Translational Neuroscience, Medical University of Plovdiv, Plovdiv, Bulgaria
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Chen X, Wu H, Lu L, Zhou N, Chen Z, Zhang X. Cerebral sparganosis in a child with corpus callosum invasion: a case report. BMC Infect Dis 2023; 23:350. [PMID: 37231358 DOI: 10.1186/s12879-023-08322-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/11/2023] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND Invasion of the corpus callosum by sparganosis is rare in children. After invading the corpus callosum, sparganosis has various migration modes, which can break through the ependyma and enter the ventricles, thus causing secondary migratory brain injury. CASE PRESENTATION A girl aged 4 years and 7 months presented with left lower limb paralysis for more than 50 days. Blood examination showed that the proportion and absolute number of eosinophils in the peripheral blood were increased. Furthermore, enzyme-linked immunosorbent assay of serum and cerebrospinal fluid samples revealed positivity for IgG and IgM antibodies for sparganosis. Initial magnetic resonance imaging (MRI) revealed ring-like enhancements in the right frontoparietal cortex, subcortical white matter, and splenium of the corpus callosum. Within 2 months, a fourth follow-up MRI showed that the lesion had spread to the left parietal cortex, subcortical white matter, and deep white matter in the right occipital lobe and right ventricular choroid plexus, with left parietal leptomeningeal enhancement. CONCLUSION Migratory movement is one of the characteristics of cerebral sparganosis. When sparganosis invades the corpus callosum, clinicians should be aware that it may then break through the ependyma and enter the lateral ventricles, leading to secondary migratory brain injury. Short-term follow-up MRI is necessary to evaluate the migration mode of sparganosis and dynamically guide treatment strategies.
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Affiliation(s)
- Xiwen Chen
- Department of Radiology, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Huiying Wu
- Department of Radiology, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Lianwei Lu
- Department of Radiology, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Ning Zhou
- Department of Radiology, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Zhen Chen
- Department of Radiology, Guangzhou Women and Children's Medical Centre, Guangzhou, China
| | - Xiaochun Zhang
- Department of Radiology, Guangzhou Women and Children's Medical Centre, Guangzhou, China.
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Chen SJ, Wu BS, Ge YJ, Chen SD, Ou YN, Dong Q, Feng J, Cheng W, Yu JT. The genetic architecture of the corpus callosum and its genetic overlap with common neuropsychiatric diseases. J Affect Disord 2023; 335:418-430. [PMID: 37164063 DOI: 10.1016/j.jad.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/25/2023] [Accepted: 05/02/2023] [Indexed: 05/12/2023]
Abstract
BACKGROUND The corpus callosum (CC) is the main structure transferring information between the cerebral hemispheres. Although previous large-scale genome-wide association study (GWAS) has illustrated the genetic architecture of white matter integrity of CC, CC volume is less stressed. METHODS Using MRI data from 33,861 individuals in UK Biobank, we conducted univariate and multivariate GWAS for CC fractional anisotropy (FA) and volume with PLINK 2.0 and MOSTest. All discovered SNPs in the multivariate framework were functionally annotated in FUMA v1.3.8. In the meanwhile, a series of gene property analyses was conducted simultaneously. In addition, we estimated genetic relationship between CC metrics and other neuropsychiatric traits and diseases. RESULTS We identified a total of 36 and 82 significant genomic loci for CC FA and volume (P < 5 × 10-8). And 53 and 27 genes were respectively mapped by four mapping strategies. For CC volume, gene-set analysis revealed pathways mainly relating to cell migration; cell-type analysis found the top enrichment in neuroglia while for CC FA in GABAergic neurons. Furthermore, we found a lot of genetic overlap and shared loci between CC FA and volume and common neuropsychiatric diseases. DISCUSSION Collectively, this study helps to better understand the genetic architecture of whole CC and CC subregions. However, the way to divide CC FA and volume in our study restricts the interpretations of our results. Future work will be needed to pay attention to the genetic structure of white matter volume, and an appropriate division of CC may help to better understand CC structure.
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Affiliation(s)
- Si-Jia Chen
- Department of Neurology and National Center for Neurological Disorders, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Bang-Sheng Wu
- Department of Neurology and National Center for Neurological Disorders, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yi-Jun Ge
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Shi-Dong Chen
- Department of Neurology and National Center for Neurological Disorders, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ya-Nan Ou
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Qiang Dong
- Department of Neurology and National Center for Neurological Disorders, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, China
| | - Jianfeng Feng
- Institute of Science and Technology for Brain-inspired Intelligence, Fudan University, Shanghai, China; Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK
| | - Wei Cheng
- Institute of Science and Technology for Brain-inspired Intelligence, Fudan University, Shanghai, China; Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK.
| | - Jin-Tai Yu
- Department of Neurology and National Center for Neurological Disorders, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, Shanghai, China.
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Kirkovski M, Singh M, Dhollander T, Fuelscher I, Hyde C, Albein-Urios N, Donaldson PH, Enticott PG. An Investigation of Age-related Neuropathophysiology in Autism Spectrum Disorder Using Fixel-based Analysis of Corpus Callosum White Matter Micro- and Macrostructure. J Autism Dev Disord 2023:10.1007/s10803-023-05980-1. [PMID: 37079181 DOI: 10.1007/s10803-023-05980-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2023] [Indexed: 04/21/2023]
Abstract
Fixel-based analysis was used to probe age-related changes in white matter micro- and macrostructure of the corpus callosum between participants with (N = 54) and without (N = 50) autism spectrum disorder (ASD). Data were obtained from the Autism Brain Imaging Data Exchange-II (ABIDE-II). Compared to age-matched controls, young adolescents with ASD (11.19 ± 7.54 years) showed reduced macroscopic fiber cross-section (logFC) and combined fiber-density and cross-section (FDC). Reduced fiber-density (FD) and FDC was noted in a marginally older (13.87 ± 3.15 years) ASD cohort. Among the oldest ASD cohort (17.07 ± 3.56 years), a non-significant trend indicative of reduced FD was noted. White matter aberration appears greatest and most widespread among younger ASD cohorts. This supports the suggestion that some early neuropathophysiological indicators in ASD may dissipate with age.
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Affiliation(s)
- Melissa Kirkovski
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, VIC, Australia.
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia.
| | - Mervyn Singh
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, VIC, Australia
| | - Thijs Dhollander
- Murdoch Children's Research Institute, Melbourne, VIC, Australia
| | - Ian Fuelscher
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, VIC, Australia
| | - Christian Hyde
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, VIC, Australia
| | - Natalia Albein-Urios
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, VIC, Australia
| | - Peter H Donaldson
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, VIC, Australia
| | - Peter G Enticott
- Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, VIC, Australia
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Su X, Wang Z, Yang Z, Song J. How I do it? Surgical removal of a corpus callosum arteriovenous malformation using a robotic digital microscope. Acta Neurochir (Wien) 2023; 165:1609-1613. [PMID: 37067619 DOI: 10.1007/s00701-023-05574-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/29/2023] [Indexed: 04/18/2023]
Abstract
BACKGROUND This report described the surgical nuance of a challenging deep-seated corpus callosum arteriovenous malformation (AVM) using a novel robotic digital microscope. METHOD A 64-year-old male was admitted to treat a ruptured corpus callosum AVM. In order to facilitate surgical manipulation under the robotic digital microscope, a gravity-assisted supine position was utilized. Intraoperatively, identifying and preserving the transit and bystander artery is important while skeletonizing the anterior cerebral artery. The nidus was totally resected and the patient was discharged without sequella. CONCLUSION It is feasible to perform complicated AVM resection under the robotic digital microscope with a rigorous surgical plan.
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Affiliation(s)
- Xingfen Su
- Department of Neurosurgery, The First Affiliated Hospital, Fujian Medical University, Fuzhou, 350004, Fujian, China
- Department of Neurosurgery, National Regional Medical Center, The First Affiliated Hospital Binhai Campus, Fujian Medical University, Fuzhou, 350209, Fujian, China
| | - Zhicheng Wang
- Department of Neurosurgery, The First Affiliated Hospital, Fujian Medical University, Fuzhou, 350004, Fujian, China
- Department of Neurosurgery, National Regional Medical Center, The First Affiliated Hospital Binhai Campus, Fujian Medical University, Fuzhou, 350209, Fujian, China
| | - Zixiao Yang
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, No. 12 Wulumuqi Zhong Road, Shanghai, 200040, China
- National Center for Neurological Disorders, Shanghai, 200040, China
- Neurosurgical Institute of Fudan University, Shanghai, 200040, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, 200040, China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, 200040, China
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences (CAMS), Shanghai, 200040, China
- Department of Neurosurgery, National Regional Medical Center, Huashan Hospital Fujian Campus, Fudan University, Fuzhou, 350209, Fujian, China
| | - Jianping Song
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, No. 12 Wulumuqi Zhong Road, Shanghai, 200040, China.
- National Center for Neurological Disorders, Shanghai, 200040, China.
- Neurosurgical Institute of Fudan University, Shanghai, 200040, China.
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, 200040, China.
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, 200040, China.
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences (CAMS), Shanghai, 200040, China.
- Department of Neurosurgery, National Regional Medical Center, Huashan Hospital Fujian Campus, Fudan University, Fuzhou, 350209, Fujian, China.
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Guarnizo Capera AP, Gallo Tapias M, David Cardona Ortegón J, Ferrer Valencia V. Atypical cytotoxic lesion and hemorrhagic involvement of the corpus callosum in severe COVID-19 infection. Curr Med Imaging 2023:CMIR-EPUB-130935. [PMID: 37066778 DOI: 10.2174/1573405620666230414110124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 04/18/2023]
Abstract
Introduction/Background The COVID-19 pandemic has resulted in a large number of deaths and has caused a significant increase in population morbidity. This viral infection has been associated with different neurological symptoms and complications that do not have a clear pathophysiological mechanism and exact implications for these patients. Case Presentation A 40-year-old man with COVID-19 and co-infection with Klebsiella pneumoniae KPC presented extensive pulmonary involvement and required comprehensive management in the intensive care unit (ICU). During his hospitalization, he developed neurological symptoms with evidence of involvement of the corpus callosum, which was attributed to the cytotoxic lesion of the corpus callosum (CLOCC). After several months of interdisciplinary management in the ICU, there was a progressive improvement in his general condition, with discharge from the hospital without significant sequelae, with follow-up images showing complete involvement of the corpus callosum due to what was considered an atypical cytotoxic lesion of the corpus callosum. Conclusion Imaging features of CLOCCs are known to be temporary, but in the setting of COVID-19, it has not yet been determined if this is true and further studies are needed. Nonetheless, the one-year follow-up of our patient makes us believe that this atypical involvement of the corpus callosum described in severe SARS-CoV-2 infections is not transitory, even if there are no neurologic sequelae.
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Siffredi V, Liverani MC, Van De Ville D, Freitas LGA, Borradori Tolsa C, Hüppi PS, Ha-Vinh Leuchter R. Corpus callosum structural characteristics in very preterm children and adolescents: Developmental trajectory and relationship to cognitive functioning. Dev Cogn Neurosci 2023; 60:101211. [PMID: 36780739 PMCID: PMC9925611 DOI: 10.1016/j.dcn.2023.101211] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 02/02/2023] [Accepted: 02/04/2023] [Indexed: 02/08/2023] Open
Abstract
Previous studies suggest that structural alteration of the corpus callosum, i.e., the largest white matter commissural pathway, occurs after a preterm birth in the neonatal period and lasts across development. The present study aims to unravel corpus callosum structural characteristics across childhood and adolescence in very preterm (VPT) individuals, and their associations with general intellectual, executive and socio-emotional functioning. Neuropsychological assessments, T1-weighted and multi-shell diffusion MRI were collected in 79 VPT and 46 full term controls aged 6-14 years. Volumetric, diffusion tensor and neurite orientation dispersion and density imaging (NODDI) measures were extracted on 7 callosal portions using TractSeg. A multivariate data-driven approach (partial least squares correlation) and a cohort-based age normative modelling approach were used to explore associations between callosal characteristics and neuropsychological outcomes. The VPT and a full-term control groups showed similar trends of white-matter maturation over time, i.e., increase FA and reduced ODI, in all callosal segments, that was associated with increase in general intellectual functioning. However, using a cohort-based age-related normative modelling, findings show atypical pattern of callosal development in the VPT group, with reduced callosal maturation over time that was associated with poorer general intellectual and working memory functioning, as well as with lower gestational age.
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Affiliation(s)
- Vanessa Siffredi
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland; Neuro-X Institute, École Polytechnique Fédérale de Lausanne, Geneva, Switzerland; Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Switzerland.
| | - Maria Chiara Liverani
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland; SensoriMotor, Affective and Social Development Laboratory, Faculty of Psychology and Educational Sciences, University of Geneva, Geneva, Switzerland
| | - Dimitri Van De Ville
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland; Neuro-X Institute, École Polytechnique Fédérale de Lausanne, Geneva, Switzerland; Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Switzerland
| | - Lorena G A Freitas
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland; Neuro-X Institute, École Polytechnique Fédérale de Lausanne, Geneva, Switzerland; Department of Radiology and Medical Informatics, Faculty of Medicine, University of Geneva, Switzerland
| | - Cristina Borradori Tolsa
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland
| | - Petra Susan Hüppi
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland
| | - Russia Ha-Vinh Leuchter
- Division of Development and Growth, Department of Paediatrics, Gynaecology and Obstetrics, Geneva University Hospitals, Geneva, Switzerland
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Guner YE, Comert A, Sayaci EY, Korkmaz AC, Gungor Y, Morali Guler T, Kahilogullari G, Savas A. Microsurgical anatomy of the anterior cerebral artery and the arterial supply of the cingulate gyrus. Surg Radiol Anat 2023; 45:351-358. [PMID: 36840818 DOI: 10.1007/s00276-023-03083-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/07/2023] [Indexed: 02/26/2023]
Abstract
PURPOSE The cingulate gyrus is a potential surgical area to treat tumours, psychiatric diseases, intractable pain and vascular malformations. The aim of the study was to define the topographic anatomy and arterial supply of the cingulate gyrus located on the medial surface of the cerebral hemisphere. METHODS We studied thirty-six hemispheres, each hemisected in the midsagittal plane. The vertical thickness of the cingulate gyrus was measured at the anterior commissure (AC), posterior commissure (PC), and genu levels of the corpus callosum. The branches of the anterior and posterior cerebral arteries supplying each zone were noted separately. The arterial pathways were transformed to digital data in AutoCAD to identify the condensation and reduction areas. RESULTS The mean AC-PC distance was 27.17 ± 1.63 mm. The thinnest region was the genu level of the corpus callosum (10.29 mm). The superior internal parietal artery (SIPA), inferior internal parietal artery (IIPA) and pericallosal artery (PrCA) supplied all zones of the cingulate gyrus. The anterior zone received the greatest supply. The arterial condensation and reduction areas on both sides of cingulate gyrus and its x, y, and z coordinates specified. CONCLUSIONS The target cingulotomy (TC) area was determined for anterior cingulotomy. The properties of the TC area are that the thinnest region of the cingulate gyrus is supplied relatively less than other areas and is close to the anterior cingulotomy areas in the literature. The arterial reduction area (ARA) was found to be suitable for corpus callosotomy in terms of avoiding haemorrhage.
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Affiliation(s)
- Yahya Efe Guner
- Department of Neurosurgery, School of Medicine, Yuksek Ihtisas University, Ankara, Turkey
| | - Ayhan Comert
- Department of Anatomy, School of Medicine, Ankara University, Ankara, Turkey.
| | - Emre Yagiz Sayaci
- Department of Neurosurgery, Memorial Ankara Hospital, Ankara, Turkey
| | - Ali Can Korkmaz
- Ministry of Health, Gulhane Training and Research Hospital, Ankara, Turkey
| | - Yigit Gungor
- Department of Anatomy, School of Medicine, Ankara University, Ankara, Turkey
| | - Tugba Morali Guler
- Department of Neurosurgery, School of Medicine, Karabuk University, Karabuk, Turkey
| | - Gokmen Kahilogullari
- Department of Neurosurgery, School of Medicine, Ankara University, Ankara, Turkey
| | - Ali Savas
- Department of Neurosurgery, School of Medicine, Ankara University, Ankara, Turkey
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Tantik Pak A, Nacar Dogan S, Sengul Y. Structural integrity of corpus callosum in patients with migraine: a diffusion tensor imaging study. Acta Neurol Belg 2023; 123:385-390. [PMID: 35303287 DOI: 10.1007/s13760-021-01863-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 12/27/2021] [Indexed: 12/20/2022]
Abstract
The aim of this study was to compare structural changes of corpus callosum (CC), which is the largest collection of white matter in the brain, among migraineurs and healthy controls (HC). Diffusion tensor imaging (DTI) method which provides information about microscopic organization of the cell, especially white matter was used for this purpose. Fifty-one patients who were diagnosed with migraine and 44 age- and sex-matched HC were included in the study. Socio-demographic and clinical characteristics of the patients were noted. Fractional anisotropy (FA) and apparent diffusion coefficient (ADC) measurements of CC genu, splenium, and body were performed for all participants. A significant difference was determined between migraine patients and HC regarding the FA values in the genu of CC (p < 0.001). When the clinical data of migraine patients and FA values in the genu of CC were analyzed via linear regression analysis, no significant finding was detected (p > 0.05). In conclusion, it can be suggested that there are microstructural changes in the CC of migraneurs; however, the clinical variable associated with this structural deterioration could not be determined.
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Affiliation(s)
- Aygul Tantik Pak
- Department of Neurology, University of Ministry Health, Gaziosmanpasa Training and Research Hospital, Istanbul, Turkey.
| | - Sebahat Nacar Dogan
- Depertmant of Radiology, University of Ministry Health, Gaziosmanpasa Training and Research Hospital, Karayollari, Osmanbey Street 621, 34255, Gaziosmanpasa, Istanbul, Turkey
| | - Yildizhan Sengul
- Department of Neurology, University of Ministry Health, Gaziosmanpasa Training and Research Hospital, Istanbul, Turkey
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50
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Calvert GHM, Carson RG. Induction of interhemispheric facilitation by short bursts of transcranial alternating current stimulation. Neurosci Lett 2023; 803:137190. [PMID: 36921664 DOI: 10.1016/j.neulet.2023.137190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023]
Abstract
Interhemispheric facilitation (IHF) describes potentiation of motor-evoked potentials (MEPs) elicited by transcranial magnetic stimulation (TMS) over primary motor cortex (M1), when they are preceded (3-6 ms) by conditioning TMS below motor threshold (MT) delivered over the opposite M1. This effect is however obtained only when the conditioning stimulation is sufficiently circumscribed. In paired associative protocols, (500 ms) bursts of 140 Hz transcranial alternating current stimulation (tACS) interact with the state of neural circuits in the opposite hemisphere in a similar manner to sub-threshold TMS. We hypothesised that tACS applied over M1 would elevate the amplitudes of MEPs elicited by suprathreshold TMS applied 6 ms later over the opposite M1. Thirty healthy right-handed participants were tested. In a control condition, MEPs were recorded in right flexor carpi radialis (rFCR) following 120% resting MT TMS over left M1. In 11 experimental conditions, 1 mA (peak-to-peak) 140 Hz (30, 100, 500 ms) or 670 Hz (6, 12, 100, 500 ms) tACS, or 100-640 Hz (6, 12, 100, 500 ms) transcranial random noise stimulation (tRNS), was delivered over right M1, 6 ms in advance of the TMS. IHF was obtained by conditioning with 30 ms (but not 100 or 500 ms) 140 Hz tACS. The magnitude of IHF (12% increase; d = 0.56 (0.21-0.98)) was within the range reported for dual-coil TMS studies. Conditioning by 670 Hz tACS or tRNS had no effect. Our findings indicate that short bursts of 140 Hz tACS, applied over M1, have distributed effects similar to those of subthreshold TMS.
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Affiliation(s)
- Glenn H M Calvert
- Trinity College Institute of Neuroscience and School of Psychology, Trinity College Dublin, Dublin, Ireland
| | - Richard G Carson
- Trinity College Institute of Neuroscience and School of Psychology, Trinity College Dublin, Dublin, Ireland; School of Psychology, Queen's University Belfast, Belfast, Northern Ireland, UK.
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