51
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Foo H, Mak E, Yong TT, Wen MC, Chander RJ, Au WL, Sitoh YY, Tan LCS, Kandiah N. Progression of subcortical atrophy in mild Parkinson's disease and its impact on cognition. Eur J Neurol 2016; 24:341-348. [DOI: 10.1111/ene.13205] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 10/25/2016] [Indexed: 12/16/2022]
Affiliation(s)
- H. Foo
- Department of Neurology; National Neuroscience Institute; Singapore
| | - E. Mak
- Department of Psychiatry; University of Cambridge; Cambridge UK
| | - T. T. Yong
- Department of Neurology; National Neuroscience Institute; Singapore
| | - M. C. Wen
- Department of Neurology; National Neuroscience Institute; Singapore
| | - R. J. Chander
- Department of Neurology; National Neuroscience Institute; Singapore
| | - W. L. Au
- Department of Neurology; National Neuroscience Institute; Singapore
- Duke-NUS; Graduate Medical School; Singapore
| | - Y. Y. Sitoh
- Duke-NUS; Graduate Medical School; Singapore
- Department of Neuroradiology; National Neuroscience Institute; Singapore
| | - L. C. S. Tan
- Department of Neurology; National Neuroscience Institute; Singapore
- Duke-NUS; Graduate Medical School; Singapore
| | - N. Kandiah
- Department of Neurology; National Neuroscience Institute; Singapore
- Duke-NUS; Graduate Medical School; Singapore
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Nemmi F, Nymberg C, Helander E, Klingberg T. Grit Is Associated with Structure of Nucleus Accumbens and Gains in Cognitive Training. J Cogn Neurosci 2016; 28:1688-1699. [PMID: 27626223 DOI: 10.1162/jocn_a_01031] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Abstract
There is a long-standing interest in the determinants of successful learning in children. “Grit” is an individual trait, reflecting the ability to pursue long-term goals despite temporary setbacks. Although grit is known to be predictive of future success in real-world learning situations, an understanding of the underlying neural basis and mechanisms is still lacking. Here we show that grit in a sample of 6-year-old children (n = 55) predicts the working memory improvement during 8 weeks of training on working memory tasks (p = .009). In a separate neuroimaging analysis performed on a partially overlapping sample (n = 27), we show that interindividual differences in grit were associated with differences in the volume of nucleus accumbens (peak voxel p = .021, x = 12, y = 11, z = −11). This was also confirmed in a leave-one-out analysis of gray matter density in the nucleus accumbens (p = .018). The results can be related to previous animal research showing the role of the nucleus accumbens to search out rewards regardless of delays or obstacles. The results provide a putative neural basis for grit and could contribute a cross-disciplinary connection of animal neuroscience to child psychology.
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Zhang M, Wells WM, Golland P. Low-Dimensional Statistics of Anatomical Variability via Compact Representation of Image Deformations. MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION : MICCAI ... INTERNATIONAL CONFERENCE ON MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION 2016; 9902:166-173. [PMID: 28664199 PMCID: PMC5484008 DOI: 10.1007/978-3-319-46726-9_20] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Using image-based descriptors to investigate clinical hypotheses and therapeutic implications is challenging due to the notorious "curse of dimensionality" coupled with a small sample size. In this paper, we present a low-dimensional analysis of anatomical shape variability in the space of diffeomorphisms and demonstrate its benefits for clinical studies. To combat the high dimensionality of the deformation descriptors, we develop a probabilistic model of principal geodesic analysis in a bandlimited low-dimensional space that still captures the underlying variability of image data. We demonstrate the performance of our model on a set of 3D brain MRI scans from the Alzheimer's Disease Neuroimaging Initiative (ADNI) database. Our model yields a more compact representation of group variation at substantially lower computational cost than models based on the high-dimensional state-of-the-art approaches such as tangent space PCA (TPCA) and probabilistic principal geodesic analysis (PPGA).
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Affiliation(s)
- Miaomiao Zhang
- Computer Science and Artificial Intelligence Laboratory, MIT, Cambridge, USA
| | - William M Wells
- Computer Science and Artificial Intelligence Laboratory, MIT, Cambridge, USA
- Brigham and Women's Hospital, Harvard Medical School, Boston, USA
| | - Polina Golland
- Computer Science and Artificial Intelligence Laboratory, MIT, Cambridge, USA
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54
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Tuite P. Magnetic resonance imaging as a potential biomarker for Parkinson's disease. Transl Res 2016; 175:4-16. [PMID: 26763585 DOI: 10.1016/j.trsl.2015.12.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/09/2015] [Accepted: 12/10/2015] [Indexed: 01/01/2023]
Abstract
Although a magnetic resonance imaging (MRI) biomarker for Parkinson's disease (PD) remains an unfulfilled objective, there have been numerous developments in MRI methodology and some of these have shown promise for PD. With funding from the National Institutes of Health and the Michael J Fox Foundation there will be further validation of structural, diffusion-based, and iron-focused MRI methods as possible biomarkers for PD. In this review, these methods and other strategies such as neurochemical and metabolic MRI have been covered. One of the challenges in establishing a biomarker is in the selection of individuals as PD is a heterogeneous disease with varying clinical features, different etiologies, and a range of pathologic changes. Additionally, longitudinal studies are needed of individuals with clinically diagnosed PD and cohorts of individuals who are at great risk for developing PD to validate methods. Ultimately an MRI biomarker will be useful in the diagnosis of PD, predicting the course of PD, providing a means to track its course, and provide an approach to select and monitor treatments.
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Affiliation(s)
- Paul Tuite
- Department of Neurology, University of Minnesota, Minneapolis, Minnesota.
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55
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Subcortical matter in the α-synucleinopathies spectrum: an MRI pilot study. J Neurol 2016; 263:1575-82. [DOI: 10.1007/s00415-016-8173-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 05/14/2016] [Accepted: 05/14/2016] [Indexed: 11/25/2022]
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56
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Lu Y, Liang H, Han D, Mo Y, Li Z, Cheng Y, Xu X, Shen Z, Tan C, Zhao W, Zhu Y, Sun X. The volumetric and shape changes of the putamen and thalamus in first episode, untreated major depressive disorder. NEUROIMAGE-CLINICAL 2016; 11:658-666. [PMID: 27222797 PMCID: PMC4873692 DOI: 10.1016/j.nicl.2016.04.008] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 03/26/2016] [Accepted: 04/13/2016] [Indexed: 12/23/2022]
Abstract
Previous MRI studies confirmed abnormalities in the limbic-cortical-striatal-pallidal-thalamic (LCSPT) network or limbic-cortico-striatal-thalamic-cortical (LCSTC) circuits in patients with major depressive disorder (MDD), but few studies have investigated the subcortical structural abnormalities. Therefore, we sought to determine whether focal subcortical grey matter (GM) changes might be present in MDD at an early stage. We recruited 30 first episode, untreated patients with major depressive disorder (MDD) and 26 healthy control subjects. Voxel-based morphometry was used to evaluate cortical grey matter changes, and automated volumetric and shape analyses were used to assess volume and shape changes of the subcortical GM structures, respectively. In addition, probabilistic tractography methods were used to demonstrate the relationship between the subcortical and the cortical GM. Compared to healthy controls, MDD patients had significant volume reductions in the bilateral putamen and left thalamus (FWE-corrected, p < 0.05). Meanwhile, the vertex-based shape analysis showed regionally contracted areas on the dorsolateral and ventromedial aspects of the bilateral putamen, and on the dorsal and ventral aspects of left thalamus in MDD patients (FWE-corrected, p < 0.05). Additionally, a negative correlation was found between local atrophy in the dorsal aspects of the left thalamus and clinical variables representing severity. Furthermore, probabilistic tractography demonstrated that the area of shape deformation of the bilateral putamen and left thalamus have connections with the frontal and temporal lobes, which were found to be related to major depression. Our results suggested that structural abnormalities in the putamen and thalamus might be present in the early stages of MDD, which support the role of subcortical structure in the pathophysiology of MDD. Meanwhile, the present study showed that these subcortical structural abnormalities might be the potential trait markers of MDD. Structural abnormalities in putamen and thalamus might be the potential trait marker of MDD at the early stage. The abnormality of LCSTC circuits, or LCSPT circuit, may contribute to the pathophysiology of MDD. The shape analysis is more sensitive to subtle structural changes than volumetric and VBM analysis.
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Affiliation(s)
- Yi Lu
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Hongmin Liang
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Dan Han
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Yin Mo
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Zongfang Li
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Yuqi Cheng
- Department of Psychiatry, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Xiufeng Xu
- Department of Psychiatry, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Zonglin Shen
- Department of Psychiatry, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Chunyan Tan
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Wei Zhao
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Yun Zhu
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Xuejin Sun
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China.
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57
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Sato W, Kochiyama T, Kubota Y, Uono S, Sawada R, Yoshimura S, Toichi M. The association between perceived social support and amygdala structure. Neuropsychologia 2016; 85:237-44. [PMID: 27039164 DOI: 10.1016/j.neuropsychologia.2016.03.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 03/10/2016] [Accepted: 03/29/2016] [Indexed: 01/17/2023]
Abstract
The subjective perception of social support plays a crucial role in human well-being. However, its structural neural substrates remain unknown. We hypothesized that the amygdala, specifically its laterobasal and superficial subregions, which have been suggested to serve social functions, could be associated with the level of perceived social support. To test this hypothesis, we assessed perceived social support using the Multidimensional Scale of Perceived Social Support. In addition, we measured the volume and shape of the amygdala using structural magnetic resonance imaging in 49 healthy participants. Global amygdala volume in the left hemisphere was positively associated with the perceived social support score after adjusting for total cerebral volume, sex, age, intelligence, and five-factor personality domains. The local shape of the laterobasal and superficial subregions of the left amygdala showed the same association with perceived social support. These data suggest that the social subregions of the left amygdala are associated with the implementation of perceived social support.
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Affiliation(s)
- Wataru Sato
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo, Kyoto 606-8507, Japan.
| | - Takanori Kochiyama
- Brain Activity Imaging Center, Advanced Telecommunications Research Institute International, 2-2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0288, Japan
| | - Yasutaka Kubota
- Health and Medical Services Center, Shiga University, 1-1-1, Baba, Hikone, Shiga 522-8522, Japan
| | - Shota Uono
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo, Kyoto 606-8507, Japan
| | - Reiko Sawada
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo, Kyoto 606-8507, Japan
| | - Sayaka Yoshimura
- Department of Neurodevelopmental Psychiatry, Habilitation and Rehabilitation, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo, Kyoto 606-8507, Japan
| | - Motomi Toichi
- Faculty of Human Health Science, Graduate School of Medicine, Kyoto University, 53 Shogoin-Kawaharacho, Sakyo-ku, Kyoto 606-8507, Japan; The Organization for Promoting Neurodevelopmental Disorder Research, 40 Shogoin-Sannocho, Sakyo, Kyoto 606-8392, Japan
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58
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Caligiuri ME, Nisticò R, Arabia G, Morelli M, Novellino F, Salsone M, Barbagallo G, Lupo A, Cascini GL, Galea D, Cherubini A, Quattrone A. Alterations of putaminal shape in de novo Parkinson's disease. Mov Disord 2016; 31:676-83. [DOI: 10.1002/mds.26550] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 12/16/2015] [Accepted: 12/16/2015] [Indexed: 12/12/2022] Open
Affiliation(s)
- Maria Eugenia Caligiuri
- Neuroimaging Unit, Institute of Bioimaging and Molecular Physiology (CNR-IBFM), National Research Council; Catanzaro Italy
| | - Rita Nisticò
- Neuroimaging Unit, Institute of Bioimaging and Molecular Physiology (CNR-IBFM), National Research Council; Catanzaro Italy
| | - Gennarina Arabia
- Institute of Neurology; University “Magna Graecia”; Catanzaro Italy
| | - Maurizio Morelli
- Institute of Neurology; University “Magna Graecia”; Catanzaro Italy
| | - Fabiana Novellino
- Neuroimaging Unit, Institute of Bioimaging and Molecular Physiology (CNR-IBFM), National Research Council; Catanzaro Italy
| | - Maria Salsone
- Institute of Neurology; University “Magna Graecia”; Catanzaro Italy
| | | | - Angela Lupo
- Institute of Neurology; University “Magna Graecia”; Catanzaro Italy
| | - Giuseppe Lucio Cascini
- Institute of Radiology, Nuclear Medicine Unit; University “Magna Graecia”; Catanzaro Italy
| | - Domenico Galea
- Institute of Radiology, Nuclear Medicine Unit; University “Magna Graecia”; Catanzaro Italy
| | - Andrea Cherubini
- Neuroimaging Unit, Institute of Bioimaging and Molecular Physiology (CNR-IBFM), National Research Council; Catanzaro Italy
| | - Aldo Quattrone
- Neuroimaging Unit, Institute of Bioimaging and Molecular Physiology (CNR-IBFM), National Research Council; Catanzaro Italy
- Institute of Neurology; University “Magna Graecia”; Catanzaro Italy
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Manza P, Zhang S, Li CR, Leung H. Resting-state functional connectivity of the striatum in early-stage Parkinson's disease: Cognitive decline and motor symptomatology. Hum Brain Mapp 2016; 37:648-62. [PMID: 26566885 PMCID: PMC4843498 DOI: 10.1002/hbm.23056] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 10/23/2015] [Accepted: 11/03/2015] [Indexed: 12/12/2022] Open
Abstract
Parkinson's disease is a neurodegenerative disorder characterized by changes to dopaminergic function in the striatum and a range of cognitive and motor deficits. Neuroimaging studies have repeatedly shown differences in activation and functional connectivity patterns of the striatum between symptomatic individuals with Parkinson's disease and healthy controls. However, the presence and severity of cognitive and motor symptoms seem to differ dramatically among individuals with Parkinson's disease at the early-stages. To investigate the neural basis of such heterogeneity, we examined the resting state functional connectivity patterns of caudate and putamen subdivisions in relation to cognitive and motor impairments among 62 early-stage individuals with Parkinson's disease (21 females, 23 drug naive, ages 39-77 years, average UPDRS motor scores off medication = 18.56, average H&Y stage = 1.66). We also explored how changes in striatal connectivity relate to changes in symptomatology over a year. There are two main findings. First, higher motor deficit rating was associated with weaker coupling between anterior putamen and midbrain including substantia nigra. Intriguingly, steeper declines in functional connectivity between these regions were associated with greater declines in motor function over the course of 1 year. Second, decline in cognitive function, particularly in the memory and visuospatial domains, was associated with stronger coupling between the dorsal caudate and the rostral anterior cingulate cortex. These findings remained significant after controlling for age, medication, gender, and education. In sum, our findings suggest that cognitive decline and motor deficit are each associated with a differentiable pattern of functional connectivity of striatal subregions. Hum Brain Mapp 37:648-662, 2016. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Peter Manza
- Department of PsychologyIntegrative Neuroscience Program, Stony Brook UniversityStony BrookNew York
| | - Sheng Zhang
- Department of PsychiatryYale UniversityNew HavenConnecticut
| | - Chiang‐Shan R. Li
- Department of PsychiatryYale UniversityNew HavenConnecticut
- Department of NeurobiologyYale UniversityNew HavenConnecticut
- Interdepartmental Neuroscience ProgramYale UniversityNew HavenConnecticut
| | - Hoi‐Chung Leung
- Department of PsychologyIntegrative Neuroscience Program, Stony Brook UniversityStony BrookNew York
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60
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Price CC, Tanner J, Nguyen PT, Schwab NA, Mitchell S, Slonena E, Brumback B, Okun MS, Mareci TH, Bowers D. Gray and White Matter Contributions to Cognitive Frontostriatal Deficits in Non-Demented Parkinson's Disease. PLoS One 2016; 11:e0147332. [PMID: 26784744 PMCID: PMC4718544 DOI: 10.1371/journal.pone.0147332] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 01/01/2016] [Indexed: 01/09/2023] Open
Abstract
Objective This prospective investigation examined: 1) processing speed and working memory relative to other cognitive domains in non-demented medically managed idiopathic Parkinson’s disease, and 2) the predictive role of cortical/subcortical gray thickness/volume and white matter fractional anisotropy on processing speed and working memory. Methods Participants completed a neuropsychological protocol, Unified Parkinson’s Disease Rating Scale, brain MRI, and fasting blood draw to rule out vascular contributors. Within group a priori anatomical contributors included bilateral frontal thickness, caudate nuclei volume, and prefrontal white matter fractional anisotropy. Results Idiopathic Parkinson’s disease (n = 40; Hoehn & Yahr stages 1–3) and non-Parkinson’s disease ‘control’ peers (n = 40) matched on demographics, general cognition, comorbidity, and imaging/blood vascular metrics. Cognitively, individuals with Parkinson’s disease were significantly more impaired than controls on tests of processing speed, secondary deficits on working memory, with subtle impairments in memory, abstract reasoning, and visuoperceptual/spatial abilities. Anatomically, Parkinson’s disease individuals were not statistically different in cortical gray thickness or subcortical gray volumes with the exception of the putamen. Tract Based Spatial Statistics showed reduced prefrontal fractional anisotropy for Parkinson’s disease relative to controls. Within Parkinson’s disease, prefrontal fractional anisotropy and caudate nucleus volume partially explained processing speed. For controls, only prefrontal white matter was a significant contributor to processing speed. There were no significant anatomical predictors of working memory for either group. Conclusions Caudate nuclei volume and prefrontal fractional anisotropy, not frontal gray matter thickness, showed unique and combined significance for processing speed in Parkinson’s disease. Findings underscore the relevance for examining gray-white matter interactions and also highlight clinical processing speed metrics as potential indicators of early cognitive impairment in PD.
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Affiliation(s)
- Catherine C. Price
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, United States of America
- University of Florida Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States of America
- * E-mail:
| | - Jared Tanner
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, United States of America
| | - Peter T. Nguyen
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, United States of America
| | - Nadine A. Schwab
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, United States of America
| | - Sandra Mitchell
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, United States of America
| | - Elizabeth Slonena
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, United States of America
| | - Babette Brumback
- Department of Biostatistics, University of Florida, Gainesville, Florida, United States of America
| | - Michael S. Okun
- Department of Neurology, University of Florida, Gainesville, Florida, United States of America
- University of Florida Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States of America
| | - Thomas H. Mareci
- Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida, United States of America
| | - Dawn Bowers
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida, United States of America
- University of Florida Center for Movement Disorders and Neurorestoration, Gainesville, Florida, United States of America
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61
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Barbagallo G, Sierra-Peña M, Nemmi F, Traon APL, Meissner WG, Rascol O, Péran P. Multimodal MRI assessment of nigro-striatal pathway in multiple system atrophy and Parkinson disease. Mov Disord 2015; 31:325-34. [PMID: 26676922 DOI: 10.1002/mds.26471] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/02/2015] [Accepted: 10/05/2015] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Parkinson's disease (PD) and multiple system atrophy (MSA) are two neurodegenerative alpha-synucleinopathies characterized by severe impairment of the nigro-striatal pathway. Based on T1-, T2*-, and diffusion-weighted magnetic resonance imaging (MRI), macro-structural and micro-structural abnormalities in these diseases can be detected. OBJECTIVE This study was undertaken to compare the nigro-striatal changes that occur in patients with PD with those in patients with both variants of MSA (the parkinsonian variant, MSA-P, and the cerebellar variant, MSA-C), and to explore correlations between different MRI parameters and clinical data. METHODS We simultaneously measured volume, T2* relaxation rates, and mean diffusivity in nigro-striatal structures (substantia nigra, caudate nucleus, and putamen) of 26 patients with PD and 29 patients with MSA (16 with MSA-P and 13 with MSA-C). RESULTS Significant changes in the putamina in patients with MSA were observed compared with patients with PD. Patients with MSA-P had higher mean diffusivity values in their putamina than did patients with PD or MSA-C. The putamina of both subgroups of MSA had higher T2* relaxation rates values than PD. Remarkably, discriminant analysis showed that using two measurements of microstructural damage (T2* relaxation rates and mean diffusivity in the putamen) allowed 96% accuracy to distinguish patients with PD from those with MSA-P. Correlation analyses between MRI findings and clinical variables revealed that patients with PD showed significant correlations only at the nigra. In patients with MSA, clinical variables correlated with MRI findings in both the nigra and striatum. CONCLUSIONS Multimodal MRI reveals different pattern of nigro-striatal involvement in patients with PD and patients with MSA.
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Affiliation(s)
- Gaetano Barbagallo
- INSERM, Imagerie Cérébrale et Handicaps Neurologiques, UMR 825, 31059, Toulouse, France.,Université de Toulouse (UPS), Imagerie Cérébrale et Handicaps Neurologiques, Toulouse, France.,Institute of Neurology, University Magna Graecia, Catanzaro, Italy
| | - Maria Sierra-Peña
- Service of Neurology, University Hospital "Marqués de Valdecilla (IFIMAV)," University of Cantabria and "Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED),", Santander, Spain
| | - Federico Nemmi
- Neuroscience Department, Retzius vag 8, Karolinska Institutet, Stockholm, Sweden
| | - Anne Pavy-Le Traon
- Centre de Référence Atrophie Multisystématisée, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Wassilios G Meissner
- Centre de Référence Atrophie Multisystématisée, Centre Hospitalier Universitaire de Bordeaux, Pessac, France.,Service de Neurologie, Centre Hospitalier Universitaire de Bordeaux, Pessac, France.,Université de Bordeaux, Institut des Maladies Neurodégénératives, Bordeaux, France.,CNRS, Institut des Maladies Neurodégénératives, Bordeaux, France
| | - Olivier Rascol
- INSERM, Imagerie Cérébrale et Handicaps Neurologiques, UMR 825, 31059, Toulouse, France.,Université de Toulouse (UPS), Imagerie Cérébrale et Handicaps Neurologiques, Toulouse, France.,Centre de Référence Atrophie Multisystématisée, Centre Hospitalier Universitaire de Toulouse, Toulouse, France.,Département de Pharmacologie Clinique, INSERM CIC1436, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | - Patrice Péran
- INSERM, Imagerie Cérébrale et Handicaps Neurologiques, UMR 825, 31059, Toulouse, France.,Université de Toulouse (UPS), Imagerie Cérébrale et Handicaps Neurologiques, Toulouse, France
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62
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Rosenberg-Katz K, Herman T, Jacob Y, Mirelman A, Giladi N, Hendler T, Hausdorff JM. Fall risk is associated with amplified functional connectivity of the central executive network in patients with Parkinson's disease. J Neurol 2015; 262:2448-56. [PMID: 26233691 DOI: 10.1007/s00415-015-7865-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/16/2015] [Accepted: 07/17/2015] [Indexed: 12/11/2022]
Abstract
Falls are debilitating problems that markedly impact the health-related quality of life of many patients with Parkinson's disease (PD). Numerous studies point to the role of executive function and attention in falls; however, the brain mechanisms underlying these relationships are less clear. Here, we aim to evaluate the brain mechanisms underlying the role of executive function in falls. Patients with PD who were fallers (n = 27) or non-fallers (n = 53) and 27 healthy older adults were examined in a cross-sectional study. Gray matter volumes of the caudate head and posterior putamen were evaluated, as these striatal regions play a role in the executive and the sensorimotor cortico-striatal networks, respectively. The functional connectivity of the central executive network and of the sensorimotor network was measured using intrinsic brain connectivity during resting state functional magnetic resonance imaging. Compared to non-fallers and healthy controls, fallers had lower gray matter volume in the caudate head, but not in the posterior putamen, and increased connectivity between posterior partial regions of the central executive network, with no difference within the sensorimotor network. Mediation analysis demonstrated that the relationships between caudate head gray matter volume and fall history and risk were mediated by increased connectivity within the central executive network, apparently via attentional changes. The above findings provide additional converging evidence for the involvement of executive-related brain changes in falls in PD and support the important role of attention and executive function in fall risk.
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Affiliation(s)
- Keren Rosenberg-Katz
- Department of Neurology, Center for the Study of Movement, Cognition, and Mobility, Tel Aviv Sourasky Medical Center, 6 Weizmann Street, 64239, Tel Aviv, Israel. .,Functional Brain Center, Wohl Institute for Advanced Imaging, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
| | - Talia Herman
- Department of Neurology, Center for the Study of Movement, Cognition, and Mobility, Tel Aviv Sourasky Medical Center, 6 Weizmann Street, 64239, Tel Aviv, Israel. .,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Yael Jacob
- Department of Neurology, Center for the Study of Movement, Cognition, and Mobility, Tel Aviv Sourasky Medical Center, 6 Weizmann Street, 64239, Tel Aviv, Israel. .,Functional Brain Center, Wohl Institute for Advanced Imaging, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel. .,Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel.
| | - Anat Mirelman
- Department of Neurology, Center for the Study of Movement, Cognition, and Mobility, Tel Aviv Sourasky Medical Center, 6 Weizmann Street, 64239, Tel Aviv, Israel.
| | - Nir Giladi
- Department of Neurology, Center for the Study of Movement, Cognition, and Mobility, Tel Aviv Sourasky Medical Center, 6 Weizmann Street, 64239, Tel Aviv, Israel. .,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. .,Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel. .,Department of Neurology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
| | - Talma Hendler
- Functional Brain Center, Wohl Institute for Advanced Imaging, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel. .,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. .,Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel. .,The School of Psychological Sciences, Tel Aviv University, Tel Aviv, Israel.
| | - Jeffrey M Hausdorff
- Department of Neurology, Center for the Study of Movement, Cognition, and Mobility, Tel Aviv Sourasky Medical Center, 6 Weizmann Street, 64239, Tel Aviv, Israel. .,Department of Physical Therapy, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. .,Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel.
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Nyberg EM, Tanabe J, Honce JM, Krmpotich T, Shelton E, Hedeman J, Berman BD. Morphologic changes in the mesolimbic pathway in Parkinson's disease motor subtypes. Parkinsonism Relat Disord 2015; 21:536-40. [PMID: 25817514 DOI: 10.1016/j.parkreldis.2015.03.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 02/11/2015] [Accepted: 03/05/2015] [Indexed: 11/26/2022]
Abstract
BACKGROUND Parkinson's disease (PD) is a common neurodegenerative disorder associated with gray matter atrophy. Cortical atrophy patterns may further help distinguish between PD motor subtypes. Comparable differences in subcortical volumes have not been found. METHODS Twenty-one cognitively intact and treated PD patients, including 12 tremor dominant (TD) subtype, Nine postural instability gait dominant (PIGD) subtype, and 20 matched healthy control subjects underwent 3.0 T high-resolution structural MRI scanning. Subcortical volumetric analysis was performed using FreeSurfer and shape analysis was performed with FIRST to assess for differences between PD patients and controls and between PD subtypes. RESULTS No significant differences in subcortical volumes were found between motor PD subtypes, but comparing grouped PD patients with controls revealed a significant increase in hippocampal volume in PD patients (p = 0.03). A significant shape difference was detected in the right nucleus accumbens (NAcc) between PD and controls and between motor subtypes. Shape differences were driven by positive deviations in the TD subtype. Correlation analysis revealed a trend between hippocampal volume and decreasing MDS-UPDRS (p = 0.06). CONCLUSION While no significant differences in subcortical volumes between PD motor subtypes were found, increased hippocampal volumes were observed in PD patients compared to controls. Right NAcc shape differences in PD patients were driven by changes in the TD subtype. These unexpected findings may be related to the effects of chronic dopaminergic replacement on the mesolimbic pathway. Further studies are needed to replicate and determine the clinical significance of such morphologic changes.
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Affiliation(s)
- Eric M Nyberg
- Department of Radiology, University of Colorado Denver, Aurora, CO, United States
| | - Jody Tanabe
- Department of Radiology, University of Colorado Denver, Aurora, CO, United States
| | - Justin M Honce
- Department of Radiology, University of Colorado Denver, Aurora, CO, United States
| | - Theodore Krmpotich
- Department of Radiology, University of Colorado Denver, Aurora, CO, United States
| | - Erika Shelton
- Department of Neurology, University of Colorado Denver, Aurora, CO, United States
| | - Jessica Hedeman
- Department of Neurology, University of Colorado Denver, Aurora, CO, United States
| | - Brian D Berman
- Department of Neurology, University of Colorado Denver, Aurora, CO, United States.
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