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- W4283377410 abstract "Abstract Background Magnetic resonance–guided focused ultrasound of the ventral intermediate nucleus is a novel incisionless ablative treatment for essential tremor (ET). Objective The aim was to study the structural and functional network changes induced by unilateral sonication of the ventral intermediate nucleus in ET. Methods Fifteen essential tremor patients (66.2 ± 15.4 years) underwent probabilistic tractography and functional magnetic resonance imaging (MRI) during unilateral postural tremor‐eliciting tasks using 3‐T MRI before, 1 month (N = 15), and 6 months (N = 10) post unilateral sonication. Results Tractography identified tract‐specific alterations within the dentato‐thalamo‐cortical tract (DTCT) affected by the unilateral lesion after sonication. Relative to the treated hand, task‐evoked activation was significantly reduced in contralateral primary sensorimotor cortex and ipsilateral cerebellar lobules IV/V and VI, and vermis. Dynamic causal modeling revealed a significant decrease in excitatory drive from the cerebellum to the contralateral sensorimotor cortex. Conclusions Thalamic lesions induced by sonication induce specific functional network changes within the DTCT, notably reducing excitatory input to ipsilateral sensorimotor cortex in ET. ©[2022] International Parkinson and Movement Disorder Society. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society" @default.
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- W4283377410 date "2022-06-23" @default.
- W4283377410 modified "2023-10-14" @default.
- W4283377410 title "Coherent Structural and Functional Network Changes after Thalamic Lesions in Essential Tremor" @default.
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- W4283377410 doi "https://doi.org/10.1002/mds.29130" @default.
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