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Role of altered cerebello-thalamo-cortical network in the neurobiology of essential tremor
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Role of altered cerebello-thalamo-cortical network in the neurobiology of essential tremor
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Journal Article
Role of altered cerebello-thalamo-cortical network in the neurobiology of essential tremor
2017
Overview
Introduction
Essential tremor (ET) is the most common movement disorder among adults. Although ET has been recognized as a mono-symptomatic benign illness, reports of non-motor symptoms and non-tremor motor symptoms have increased its clinical heterogeneity. The neural correlates of ET are not clearly understood. The aim of this study was to understand the neurobiology of ET using resting state fMRI.
Methods
Resting state functional MR images of 30 patients with ET and 30 age- and gender-matched healthy controls were obtained. The functional connectivity of the two groups was compared using whole-brain seed-to-voxel-based analysis.
Results
The ET group had decreased connectivity of several cortical regions especially of the primary motor cortex and the primary somatosensory cortex with several right cerebellar lobules compared to the controls. The thalamus on both hemispheres had increased connectivity with multiple posterior cerebellar lobules and vermis. Connectivity of several right cerebellar seeds with the cortical and thalamic seeds had significant correlation with an overall score of Fahn-Tolosa-Marin tremor rating scale (FTM-TRS) as well as the subscores for head tremor and limb tremor.
Conclusion
Seed-to-voxel resting state connectivity analysis revealed significant alterations in the cerebello-thalamo-cortical network in patients with ET. These alterations correlated with the overall FTM scores as well as the subscores for limb tremor and head tremor in patients with ET. These results further support the previous evidence of cerebellar pathology in ET.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,Springer Verlag
Subject
/ Cardiology and Cardiovascular Medicine
/ Cerebellum - diagnostic imaging
/ Cerebellum - physiopathology
/ Essential Tremor - diagnostic imaging
/ Essential Tremor - pathology
/ Essential Tremor - physiopathology
/ Female
/ fMRI
/ Humans
/ Image Interpretation, Computer-Assisted
/ Imaging
/ Magnetic Resonance Imaging - methods
/ Male
/ Medicine
/ Motor Cortex - diagnostic imaging
/ Motor Cortex - physiopathology
/ NMR
/ Radiology, Nuclear Medicine and Imaging
/ Sciences de la santé humaine
/ Somatosensory Cortex - diagnostic imaging
/ Somatosensory Cortex - physiopathology
/ Thalamus
