Document Detail

Bilateral effect of a unilateral voluntary modulation of physiological tremor.
MedLine Citation:
PMID:  20185364     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Verify whether a unilateral physiological tremor modulation attempt has a bilateral effect on central oscillators responsible for physiological tremor. METHODS: Bilateral finger physiological tremor was recorded in 35 right-handed participants with laser displacement sensors in: (A) control condition, (B) modulation attempt of physiological tremor of the right index finger, (C) modulation attempt of physiological tremor of the right index finger by using co-contraction as a means to stabilize the finger. RESULTS: Physiological tremor amplitude was significantly reduced between the control and modulation conditions for the right index finger. Physiological tremor amplitude was also significantly reduced for the left index finger. Regression analysis of oscillation amplitudes showed little relationship between both fingers, even during modulation attempts. The lack of relationship between fingers is also evident by low coherence values obtained in the control and modulation conditions. The coherence in the co-activation condition was significantly higher, albeit still low, in each frequency band. CONCLUSION: Our results confirm that physiological tremor can be voluntarily reduced, and this reduction is bilateral. The modulation attempt did not however increase the frequency relationship between both sides. SIGNIFICANCE: A central command aiming at modulating tremor amplitude will not increase the synchronization between oscillators responsible for the central components of physiological tremor.
Jean-Fran?ois Daneault; Benoit Carignan; Christian Duval
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-02-24
Journal Detail:
Title:  Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology     Volume:  121     ISSN:  1872-8952     ISO Abbreviation:  Clin Neurophysiol     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-03-30     Completed Date:  2010-04-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100883319     Medline TA:  Clin Neurophysiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  734-43     Citation Subset:  IM    
Copyright Information:
Copyright 2009 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.
D?partement de Kinanthropologie, Universit? du Qu?bec ? Montr?al, Montr?al, Que., Canada.
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MeSH Terms
Analysis of Variance
Brain / physiopathology
Cortical Synchronization
Fingers / physiopathology*
Lasers / diagnostic use
Muscle Contraction*
Muscle, Skeletal / physiopathology*
Regression Analysis
Tremor / physiopathology*,  psychology*
Young Adult

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