Eran Dayan1, Miriam Sklerov2, Nina Browner2. 1. From the Department of Radiology (E.D.), Biomedical Research Imaging Center and Neuroscience Curriculum, and Department of Neurology (M.S., N.B.), University of North Carolina at Chapel Hill. eran_dayan@med.unc.edu. 2. From the Department of Radiology (E.D.), Biomedical Research Imaging Center and Neuroscience Curriculum, and Department of Neurology (M.S., N.B.), University of North Carolina at Chapel Hill.
Abstract
OBJECTIVE: To test whether symptoms of autonomic dysfunction in Parkinson disease (PD) are associated with alterations in intrinsic hypothalamic functional connectivity, given the regulatory role of the hypothalamus (HTH) in the autonomic nervous system. METHODS: Resting-state fMRI scans from patients with PD were analyzed, comparing patients with the highest (n = 24) and lowest (n = 28) quartile scores in a questionnaire assessing autonomic dysfunction in PD (Scales for Outcomes in Parkinson's Disease-Autonomic [SCOPA-AUT]), obtained from a larger pool of patients (n = 93). Higher scores on the SCOPA-AUT indicate more severe symptoms. Seed-based functional connectivity maps, based on a seed region in the left and right HTH, were computed for each patient and compared by use of a general linear model, with false discovery rate correction for multiple comparisons. Partial correlation tests were additionally performed to test whether the associations between SCOPA-AUT scores and hypothalamic functional connectivity were independent of motor dysfunction, disease duration, cognitive function, and age. RESULTS: Relative to patients with PD with lower SCOPA-AUT scores, patients with higher scores displayed significantly reduced functional connectivity between the HTH and the striatum (caudate, putamen) and thalamus. The significant association between striato-thalamo-hypothalamic functional connectivity and SCOPA-AUT scores was retained after controlling for each patient's corresponding Movement Disorder Society Unified Parkinson's Disease Rating Scale scores, age, disease duration, and cognitive function. CONCLUSIONS: Patients with PD with symptoms of autonomic dysfunction show disrupted thalamo-striato-hypothalamic functional connectivity independently of overall motor dysfunction, disease duration, age and cognitive function. These findings suggest that symptoms of autonomic dysfunction in PD are accompanied by central deficits in the neural circuits that regulate autonomic function and their interaction with the basal ganglia.
OBJECTIVE: To test whether symptoms of autonomic dysfunction in Parkinson disease (PD) are associated with alterations in intrinsic hypothalamic functional connectivity, given the regulatory role of the hypothalamus (HTH) in the autonomic nervous system. METHODS: Resting-state fMRI scans from patients with PD were analyzed, comparing patients with the highest (n = 24) and lowest (n = 28) quartile scores in a questionnaire assessing autonomic dysfunction in PD (Scales for Outcomes in Parkinson's Disease-Autonomic [SCOPA-AUT]), obtained from a larger pool of patients (n = 93). Higher scores on the SCOPA-AUT indicate more severe symptoms. Seed-based functional connectivity maps, based on a seed region in the left and right HTH, were computed for each patient and compared by use of a general linear model, with false discovery rate correction for multiple comparisons. Partial correlation tests were additionally performed to test whether the associations between SCOPA-AUT scores and hypothalamic functional connectivity were independent of motor dysfunction, disease duration, cognitive function, and age. RESULTS: Relative to patients with PD with lower SCOPA-AUT scores, patients with higher scores displayed significantly reduced functional connectivity between the HTH and the striatum (caudate, putamen) and thalamus. The significant association between striato-thalamo-hypothalamic functional connectivity and SCOPA-AUT scores was retained after controlling for each patient's corresponding Movement Disorder Society Unified Parkinson's Disease Rating Scale scores, age, disease duration, and cognitive function. CONCLUSIONS:Patients with PD with symptoms of autonomic dysfunction show disrupted thalamo-striato-hypothalamic functional connectivity independently of overall motor dysfunction, disease duration, age and cognitive function. These findings suggest that symptoms of autonomic dysfunction in PD are accompanied by central deficits in the neural circuits that regulate autonomic function and their interaction with the basal ganglia.
Authors: Jared T Hinkle; Kate Perepezko; Kelly A Mills; Zoltan Mari; Ankur Butala; Ted M Dawson; Alexander Pantelyat; Liana S Rosenthal; Gregory M Pontone Journal: Parkinsonism Relat Disord Date: 2018-08-22 Impact factor: 4.891
Authors: Jin Hua Zheng; Wen Hua Sun; Jian Jun Ma; Zhi Dong Wang; Qing Qing Chang; Lin Rui Dong; Xiao Xue Shi; Ming Jian Li Journal: Clin Auton Res Date: 2022-01-20 Impact factor: 4.435
Authors: Felipe Azevedo Gomes; Rafael Appel Flores; Maciel Alencar Bruxel; Flávia Natividade da Silva; Eduardo Luiz Gasnhar Moreira; Daniel Breseghello Zoccal; Rui Daniel Prediger; Alex Rafacho Journal: Front Neurosci Date: 2019-01-09 Impact factor: 4.677