| A distinctive pattern of cortical excitability in patients with the syndrome of dystonia and cerebellar ataxia. | |
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MedLine Citation:
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PMID: 21419696 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: The syndrome of dystonia and cerebellar ataxia (DYTCA) is a recently described condition where cervical dystonia and mild cerebellar ataxia are the major clinical features. Here we attempted to explore the pathophysiology of this condition by comparing measurements of cortical excitability between patients with DYTCA, typical primary dystonia and healthy controls. METHODS: Motor threshold, active MEP recruitment and CSP duration were measured and the excitability of the intracortical inhibitory and excitatory circuits was assessed at rest using a paired pulse protocol. RESULTS: We identified a distinctive pattern of cortical excitability in DYTCA patients different from that found in primary dystonia, namely hyperexcitable short-interval intracortical inhibition. CONCLUSION: DYTCA patients have a noticeably dissimilar excitability profile from patients with primary dystonia. SIGNIFICANCE: A tendency for increased SICI has been previously described in cerebellar syndromes and the altered excitability profile seen in these patients is therefore possibly a consequence of the cerebellar dysfunction in DYTCA. A direct link between reduced intracortical inhibition and dystonia has recently been questioned and our results additionally suggest that reduced motor cortex inhibition is not a prerequisite for dystonia to occur. |
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Authors:
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Penelope Talelli; Britt S Hoffland; Susanne A Schneider; Mark J Edwards; Kailash P Bhatia; Bart P C van de Warrenburg; John C Rothwell |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-16 |
Journal Detail:
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Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: - ISSN: 1872-8952 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 International Federation of Clinical Neurophysiology. All rights reserved. |
Affiliation:
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Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, UCL, London WC1N 3BG, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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