期刊
CLINICAL NEUROPHYSIOLOGY
卷 126, 期 7, 页码 1387-1391出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.clinph.2014.10.140
关键词
TMS; Dystonia; Motor cortex
资金
- National Center for Research Resources
- National Center for Advancing Translational Sciences of the National Institutes of Health [KL2 TR000089, UL1 TR000041]
Objective: This study aims to understand whether the enhanced dPMI, seen in writer's cramp patients previously, extends to other populations of focal dystonia patients (e.g. cervical dystonia) as an endophenotypic marker. Methods: We studied 9 healthy subjects and 9 patients with CD. dPMI was tested by applying conditioning transcranial magnetic stimulation to the left dorsal premotor cortex and then a test pulse to the ipsilateral motor cortex at an interval of 6 ms. We also looked at the duration of the cortical silent period (CSP)-a measure of cortical excitability. Results: CD patients had enhanced dPMI at rest (mean 57.0%, SD 16.2) in contrast to healthy volunteers (mean 124.1%, SD 35.7) (p < 0.001). CSP latencies (in ms) in CD patients (mean 108.0, SD 33.1) were significantly shorter than in healthy volunteers (mean 159.1, SD 55.2) (p < 0.05). Conclusions: CD patients showed enhanced dPMI in a hand muscle-distant from their affected body part-similar to writer's cramp patients. This enhanced inhibition was independent of disease severity and neck posture. This suggests that enhanced dPMI may be an endophenotypic marker of dystonia. Significance: The abnormal dorsal premotor-motor connection in cervical dystonia is a potential novel and important avenue for therapeutic targeting. (C) 2014 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据