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Park MH, Kim JS, Lee S, Kim DH, Oh SH. Increased Resting-State Positron Emission Tomography Activity After Cochlear Implantation in Adult Deafened Cats. Clin Exp Otorhinolaryngol 2023; 16:326-333. [PMID: 36397262 DOI: 10.21053/ceo.2022.00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 11/09/2022] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES Cochlear implants are widely used for hearing rehabilitation in patients with profound sensorineural hearing loss. However, Cochlear implants have variable. RESULTS and central neural plasticity is considered to be a reason for this variability. We hypothesized that resting-state cortical networks play a role in conditions of profound hearing loss and are affected by cochlear implants. To investigate the resting-state neuronal networks after cochlear implantation, we acquired 18F-fluorodeoxyglucose (FDG)-positron emission tomography (PET) images in experimental animals. METHODS Eight adult domestic cats were enrolled in this study. The hearing threshold of the animals was within the normal range, as measured by auditory evoked potential. They were divided into control (n=4) and hearing loss (n=4) groups. Hearing loss was induced by co-administration of ethacrynic acid and kanamycin. FDG-PET was performed in a normal hearing state and 4 and 11 months after the deafening procedure. Cochlear implantation was performed in the right ear, and electrical cochlear stimulation was performed for 7 months (from 4 to 11 months after the deafening procedure). PET images were compared between the two groups at the three time points. RESULTS Four months after hearing loss, the auditory cortical area's activity decreased, and activity in the associated visual area increased. After 7 months of cochlear stimulation, the superior marginal gyrus and cingulate gyrus, which are components of the default mode network, showed hypermetabolism. The inferior colliculi showed hypometabolism. CONCLUSION Resting-state cortical activity in the default mode network components was elevated after cochlear stimulation. This suggests that the animals' awareness level was elevated after hearing restoration by the cochlear implantation.
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Affiliation(s)
- Min-Hyun Park
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea
- Department of Otorhinolaryngology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea
| | - Jin Su Kim
- Division of RI Application, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Seonhwa Lee
- Division of RI Application, Korea Institute of Radiological and Medical Sciences, Seoul, Korea
| | - Doo Hee Kim
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea
| | - Seung Ha Oh
- Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea
- Sensory Organ Research Institute, Seoul National University Medical Research Center, Seoul, Korea
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Kleiser R, Raffelsberger T, Trenkler J, Meckel S, Seitz R. What influence do face masks have on reading emotions in faces? NEUROIMAGE: REPORTS 2022. [DOI: 10.1016/j.ynirp.2022.100141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kim JS, Lee HJ, Lee S, Lee HS, Jeong YJ, Son Y, Kim JM, Lee YJ, Park MH. Conductive Hearing Loss Aggravates Memory Decline in Alzheimer Model Mice. Front Neurosci 2020; 14:843. [PMID: 32903751 PMCID: PMC7438902 DOI: 10.3389/fnins.2020.00843] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/20/2020] [Indexed: 11/26/2022] Open
Abstract
The study of cognitive impairment associated with hearing loss has recently garnered considerable interest. Epidemiological data have demonstrated that hearing loss is a risk factor for cognitive decline as a result of aging. However, no previous study has examined the effect of hearing loss in patients with cognitive problems such as Alzheimer’s disease. Therefore, we investigated the effect of conductive hearing loss in an Alzheimer’s mouse model. Positron emission tomography (PET) and magnetic resonance imaging (MRI) were used to evaluate changes in glucose metabolism and gray matter concentrations in the 5xFAD Alzheimer’s Disease (AD) transgenic mouse model with and without conductive hearing loss (HL). Conductive hearing loss was induced using chronic perforation of the tympanic membrane. Behavioral data from the Y-maze and passive avoidance tests revealed greater memory deficits in the AD with HL (AD-HL) group than in the AD group. Following induction of hearing loss, lower cerebral glucose metabolism in the frontal association cortex was observed in the AD-HL group than in the AD group. Although lower glucose metabolism in the hippocampus and cerebellum was found in the AD-HL group than in the AD group at 3 months, the gray matter concentrations in these regions were not significantly different between the groups. Furthermore, the gray matter concentrations in the simple lobule, cingulate/retrosplenial cortex, substantia nigra, retrosigmoid nucleus, medial geniculate nucleus, and anterior pretectal nucleus at 7 months were significantly lower in the AD-HL group than in the AD group. Taken together, these results indicate that even partial hearing loss can aggravate memory impairment in Alzheimer’s disease.
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Affiliation(s)
- Jin Su Kim
- Division of RI Application, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea.,Radiological and Medico-Oncological Sciences, University of Science and Technology, Seoul, South Korea
| | - Hae-June Lee
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Seonhwa Lee
- Division of RI Application, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea.,Department of Bio-Convergence Engineering, Korea University, Seoul, South Korea
| | - Ho Sun Lee
- Department of Otorhinolaryngology, Boramae Medical Center, Seoul Metropolitan Government-Seoul National University, Seoul, South Korea.,Department of Otorhinolaryngology, College of Medicine, Seoul National University, Seoul, South Korea
| | - Ye Ji Jeong
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Yeonghoon Son
- Division of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea.,National Primate Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, South Korea
| | - Jung Min Kim
- Department of Bio-Convergence Engineering, Korea University, Seoul, South Korea
| | - Yong Jin Lee
- Division of RI Application, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Min-Hyun Park
- Department of Otorhinolaryngology, Boramae Medical Center, Seoul Metropolitan Government-Seoul National University, Seoul, South Korea.,Department of Otorhinolaryngology, College of Medicine, Seoul National University, Seoul, South Korea
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Han JH, Lee HJ, Kang H, Oh SH, Lee DS. Brain Plasticity Can Predict the Cochlear Implant Outcome in Adult-Onset Deafness. Front Hum Neurosci 2019; 13:38. [PMID: 30837852 PMCID: PMC6389609 DOI: 10.3389/fnhum.2019.00038] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 01/24/2019] [Indexed: 01/30/2023] Open
Abstract
Sensory plasticity, which is associated with deafness, has not been as thoroughly investigated in the adult brain as it has in the developing brain. In this study, we examined the brain reorganization induced by auditory deprivation in people with adult-onset deafness and its clinical relevance by measuring glucose metabolism before cochlear implant (CI) surgery. F-18 fluorodeoxyglucose positron emission tomography (18F-FDG-PET) scans were performed in 37 postlingually deafened patients during the preoperative workup period, and in 39 normal-hearing (NH) controls. Behavioral CI outcomes were measured at 1 year after implantation using a phoneme identification test with auditory cueing only. In the deaf individuals, areas involved in the auditory pathway such as the inferior colliculus and bilateral superior temporal gyri were hypometabolic compared to the NH controls. The hypometabolism observed in the deaf auditory cortices gradually returned to levels similar to the controls as the duration of deafness increased. However, contrary to our previous findings in congenitally deaf children, this metabolic recovery failed to have a significant prognostic value for the recovery of the speech perception ability in adult CI patients. In a broad occipital area centered on the primary visual cortices, glucose metabolism was higher in the deaf patients than the controls, suggesting that the area had become visually hyperactive for sensory compensation immediately after the onset of deafness. In addition, a negative correlation between the metabolic activity and behavioral speech perception outcomes was observed in the visual association areas. In the medial frontal cortices, cortical metabolism in most patients decreased, but patients who had preserved metabolic activities showed better speech performance. These results suggest that the auditory cortex in people with adult-onset deafness is relatively resistant to cross-modal plasticity, and instead, individual traits in late-stage visual processing and cognitive control seem to be more reliable prognostic markers for adult-onset deafness.
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Affiliation(s)
- Ji-Hye Han
- Laboratory of Brain & Cognitive Sciences for Convergence Medicine, Hallym University College of Medicine, Chuncheon, South Korea
| | - Hyo-Jeong Lee
- Laboratory of Brain & Cognitive Sciences for Convergence Medicine, Hallym University College of Medicine, Chuncheon, South Korea.,Department of Otorhinolaryngology-Head and Neck Surgery, Hallym University College of Medicine, Chuncheon, South Korea
| | - Hyejin Kang
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul, South Korea.,BK21 Plus Global Translational Research on Molecular Medicine and Biopharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Seung-Ha Oh
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, South Korea.,Sensory Organ Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Dong Soo Lee
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul, South Korea.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea
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Park MH, Jang JH, Song JJ, Lee HS, Oh SH. Neurofilament heavy chain expression and neuroplasticity in rat auditory cortex after unilateral and bilateral deafness. Hear Res 2016; 339:155-60. [PMID: 27457532 DOI: 10.1016/j.heares.2016.07.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 07/16/2016] [Accepted: 07/19/2016] [Indexed: 01/24/2023]
Abstract
Deafness induces many plastic changes in the auditory neural system. For instance, dendritic changes cause synaptic changes in neural cells. SMI-32, a monoclonal antibody reveals auditory areas and recognizes non-phosphorylated epitopes on medium- and high-molecular-weight subunits of neurofilament proteins in cortical pyramidal neuron dendrites. We investigated SMI-32-immunoreactive (-ir) protein levels in the auditory cortices of rats with induced unilateral and bilateral deafness. Adult male Sprague-Dawley rats were divided into unilateral deafness (UD), bilateral deafness (BD), and control groups. Deafness was induced by cochlear ablation. All rats were sacrificed, and the auditory cortices were harvested for real-time quantitative polymerase chain reaction (RT-qPCR) and western blot analyses at 2, 4, 6, and 12 weeks after deafness was induced. Immunohistochemical staining was performed to evaluate the location of SMI-32-ir neurons. Neurofilament heavy chain (NEFH) mRNA expression and SMI-32-ir protein levels were increased in the BD group. In particular, SMI-32-ir protein levels increased significantly 6 and 12 weeks after deafness was induced. In contrast, no significant changes in protein level were detected in the right or left auditory cortices at any time point in the UD group. NEFH mRNA level decreased at 4 weeks after deafness was induced in the UD group, but recovered thereafter. Taken together, BD induced plastic changes in the auditory cortex, whereas UD did not affect the auditory neural system sufficiently to show plastic changes, as measured by neurofilament protein level.
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Affiliation(s)
- Min-Hyun Park
- Department of Otorhinolaryngology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, 07061, Boramae Road 5 Gil 20, Dongjak-gu, Seoul, South Korea.
| | - Jeong Hun Jang
- Department of Otorhinolaryngology Head and Neck Surgery, Ajou University Hospital, 16499, World cup-ro 164, Yeongtong-gu, Suwon, Gyeonggi-do, South Korea
| | - Jae-Jin Song
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, 13620, Gumi-Ro 173 Beon-Gil 82, Bundang-gu, Gyeonggi-Do, South Korea
| | - Ho Sun Lee
- Department of Otorhinolaryngology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, 07061, Boramae Road 5 Gil 20, Dongjak-gu, Seoul, South Korea
| | - Seung Ha Oh
- Department of Otorhinolaryngology, College of Medicine, Seoul National University, 03080, Daehangno 101, Jongno-gu, Seoul, South Korea
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Chen Z, Yuan W. Central plasticity and dysfunction elicited by aural deprivation in the critical period. Front Neural Circuits 2015; 9:26. [PMID: 26082685 PMCID: PMC4451366 DOI: 10.3389/fncir.2015.00026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 05/13/2015] [Indexed: 12/31/2022] Open
Abstract
The acoustic signal is crucial for animals to obtain information from the surrounding environment. Like other sensory modalities, the central auditory system undergoes adaptive changes (i.e., plasticity) during the developmental stage as well as other stages of life. Owing to its plasticity, auditory centers may be susceptible to various factors, such as medical intervention, variation in ambient acoustic signals and lesion of the peripheral hearing organ. There are critical periods during which auditory centers are vulnerable to abnormal experiences. Particularly in the early postnatal development period, aural inputs are essential for functional maturity of auditory centers. An aural deprivation model, which can be achieved by attenuating or blocking the peripheral acoustic afferent input to the auditory center, is ideal for investigating plastic changes of auditory centers. Generally, auditory plasticity includes structural and functional changes, some of which can be irreversible. Aural deprivation can distort tonotopic maps, disrupt the binaural integration, reorganize the neural network and change the synaptic transmission in the primary auditory cortex or at lower levels of the auditory system. The regulation of specific gene expression and the modified signal pathway may be the deep molecular mechanism of these plastic changes. By studying this model, researchers may explore the pathogenesis of hearing loss and reveal plastic changes of the auditory cortex, facilitating the therapeutic advancement in patients with severe hearing loss. After summarizing developmental features of auditory centers in auditory deprived animals and discussing changes of central auditory remodeling in hearing loss patients, we aim at stressing the significant of an early and well-designed auditory training program for the hearing rehabilitation.
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Affiliation(s)
- Zhiji Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Southwest Hospital, Third Military Medical University Chongqing, China
| | - Wei Yuan
- Department of Otorhinolaryngology Head and Neck Surgery, Southwest Hospital, Third Military Medical University Chongqing, China
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Wong C, Chabot N, Kok MA, Lomber SG. Amplified somatosensory and visual cortical projections to a core auditory area, the anterior auditory field, following early- and late-onset deafness. J Comp Neurol 2015; 523:1925-47. [DOI: 10.1002/cne.23771] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 02/25/2015] [Accepted: 02/26/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Carmen Wong
- Cerebral Systems Laboratory, University of Western Ontario; London Ontario N6A 5K8 Canada
- Graduate Program in Neuroscience; University of Western Ontario; London Ontario N6A 5K8 Canada
| | - Nicole Chabot
- Cerebral Systems Laboratory, University of Western Ontario; London Ontario N6A 5K8 Canada
- Department of Physiology and Pharmacology; University of Western Ontario; London Ontario N6A 5K8 Canada
| | - Melanie A. Kok
- Cerebral Systems Laboratory, University of Western Ontario; London Ontario N6A 5K8 Canada
- Graduate Program in Neuroscience; University of Western Ontario; London Ontario N6A 5K8 Canada
| | - Stephen G. Lomber
- Cerebral Systems Laboratory, University of Western Ontario; London Ontario N6A 5K8 Canada
- Department of Physiology and Pharmacology; University of Western Ontario; London Ontario N6A 5K8 Canada
- Department of Psychology; University of Western Ontario; London Ontario N6A 5K8 Canada
- Brain and Mind Institute, University of Western Ontario; London Ontario N6A 5K8 Canada
- National Centre for Audiology, University of Western Ontario; London Ontario N6A 5K8 Canada
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Cochlear Implantation in Children With Congenital and Noncongenital Unilateral Deafness. Otol Neurotol 2015; 36:235-9. [PMID: 25415465 DOI: 10.1097/mao.0000000000000677] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Okuda T, Nagamachi S, Ushisako Y, Tono T. Glucose metabolism in the primary auditory cortex of postlingually deaf patients: an FDG-PET study. ORL J Otorhinolaryngol Relat Spec 2014; 75:342-9. [PMID: 24435067 DOI: 10.1159/000357474] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Accepted: 11/18/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND/PURPOSE Previous FDG-PET studies have indicated neuroplasticity in the adult auditory cortex in cases of postlingual deafness. In the mature brain, auditory deprivation decreased neuronal activity in primary auditory and auditory-related cortices. In order to reevaluate these issues, we used statistical analytic software, namely a three-dimensional stereotaxic region of interest template (3DSRT), in addition to statistical parametric mapping (SPM; Institute of Neurology, University College of London, UK). MATERIALS AND METHODS (18)F-FDG brain PET scans were performed on 7 postlingually deaf patients and 10 healthy volunteers. Significant increases and decreases of regional cerebral glucose metabolism in the patient group were estimated by comparing their PET images with those of healthy volunteers using SPM analysis and 3DSRT. RESULTS SPM revealed that the glucose metabolism of the deaf patients was lower in the right superior temporal gyrus, both middle temporal gyri, left inferior temporal gyrus, right inferior lobulus parietalis, right posterior cingulate gyrus, and left insular cortex than that of the control subjects. 3DSRT data also revealed significantly decreased glucose metabolism in both primary auditory cortices of the postlingually deaf patients. CONCLUSION SPM and 3DSRT analyses indicated that glucose metabolism decreased in the primary auditory cortex of the postlingually deaf patients. The previous results of PET studies were confirmed, and our method involving 3DSRT has proved to be useful.
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Affiliation(s)
- Takumi Okuda
- Departments of Otolaryngology - Head and Neck Surgery, Miyazaki University School of Medicine, Miyazaki, Japan
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Kok MA, Chabot N, Lomber SG. Cross-modal reorganization of cortical afferents to dorsal auditory cortex following early- and late-onset deafness. J Comp Neurol 2013; 522:654-75. [DOI: 10.1002/cne.23439] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 07/04/2013] [Accepted: 07/18/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Melanie A. Kok
- Graduate Program in Neuroscience; University of Western Ontario; London Ontario N6A 5C1 Canada
- Schulich School of Medicine and Dentistry; University of Western Ontario; London Ontario N6A 5C1 Canada
- Cerebral Systems Laboratory; University of Western Ontario; London Ontario N6A 5C1 Canada
| | - Nicole Chabot
- Cerebral Systems Laboratory; University of Western Ontario; London Ontario N6A 5C1 Canada
- Department of Physiology and Pharmacology; University of Western Ontario; London Ontario N6A 5C1 Canada
| | - Stephen G. Lomber
- Schulich School of Medicine and Dentistry; University of Western Ontario; London Ontario N6A 5C1 Canada
- Cerebral Systems Laboratory; University of Western Ontario; London Ontario N6A 5C1 Canada
- Department of Physiology and Pharmacology; University of Western Ontario; London Ontario N6A 5C1 Canada
- Department of Psychology; University of Western Ontario; London Ontario N6A 5C1 Canada
- Brain and Mind Institute, University of Western Ontario; London Ontario N6A 5C1 Canada
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Barone P, Lacassagne L, Kral A. Reorganization of the connectivity of cortical field DZ in congenitally deaf cat. PLoS One 2013; 8:e60093. [PMID: 23593166 PMCID: PMC3625188 DOI: 10.1371/journal.pone.0060093] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 02/25/2013] [Indexed: 02/07/2023] Open
Abstract
Psychophysics and brain imaging studies in deaf patients have revealed a functional crossmodal reorganization that affects the remaining sensory modalities. Similarly, the congenital deaf cat (CDC) shows supra-normal visual skills that are supported by specific auditory fields (DZ-dorsal zone and P-posterior auditory cortex) but not the primary auditory cortex (A1). To assess the functional reorganization observed in deafness we analyzed the connectivity pattern of the auditory cortex by means of injections of anatomical tracers in DZ and A1 in both congenital deaf and normally hearing cats. A quantitative analysis of the distribution of the projecting neurons revealed the presence of non-auditory inputs to both A1 and DZ of the CDC which were not observed in the hearing cats. Firstly, some visual (areas 19/20) and somatosensory (SIV) areas were projecting toward DZ of the CDC but not in the control. Secondly, A1 of the deaf cat received a weak projection from the visual lateral posterior nuclei (LP). Most of these abnormal projections to A1 and DZ represent only a small fraction of the normal inputs to these areas. In addition, most of the afferents to DZ and A1 appeared normal in terms of areal specificity and strength of projection, with preserved but smeared nucleotopic gradient of A1 in CDCs. In conclusion, while the abnormal projections revealed in the CDC can participate in the crossmodal compensatory mechanisms, the observation of a limited reorganization of the connectivity pattern of the CDC implies that functional reorganization in congenital deafness is further supported also by normal cortico-cortical connectivity.
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Affiliation(s)
- Pascal Barone
- Université Toulouse, CerCo, Université Paul Sabatier, Toulouse, France.
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Wong C, Chabot N, Kok MA, Lomber SG. Modified Areal Cartography in Auditory Cortex Following Early- and Late-Onset Deafness. Cereb Cortex 2013; 24:1778-92. [DOI: 10.1093/cercor/bht026] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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