Linked Life Data

21075172

Source:http://linkedlifedata.com/resource/pubmed/id/21075172

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2011-1-12
pubmed:abstractText
The performance of a demanding exercise can result in motor performance deterioration and depression of primary motor cortex excitability. In the present work we defined a motor task that requires measurable skilled performance to unveil motor performance changes during the execution of a demanding task and to investigate the dynamics of motor performance and cortical excitability changes in absence of overt peripheral fatigue. Twenty-one normal subjects, divided into three groups were asked to perform a sequence of finger opposition movements (SEQ) paced at 2 Hz for 5 min, quantitatively evaluated by means of a sensor-engineered glove able to perform a spatio-temporal analysis of motor performance. Maximal voluntary contraction (MVC) was evaluated before and after the motor task in group 1 while motor evoked potentials (MEP) were evaluated before and after the motor task in group 2 and 3. Group 1 and 2 performed the 5 min-SEQ while group 3 was asked to perform the 5 min-SEQ twice to assess the dynamics of motor performance and cortical excitability. As a result, we found that the execution of 5 min-SEQ induced motor performance deterioration associated with no change in MVC but a decrease in cortical excitability. We further found that the dynamics of cortical excitability and motor performance were different. In fact, a short rest period (i.e., period necessary to collect MEP) between the execution of two 5 min-SEQs was able to recover the motor performance but not the cortical excitability. Finally, no change in spinal excitability was observed. These findings suggest that although primary motor cortex seems to be mainly involved in motor performance deterioration during the execution of a demanding finger motor task, the recovery of motor performance does not follow cortical excitability dynamics.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1873-7544
pubmed:author
pubmed:copyrightInfo
Copyright © 2011 IBRO. Published by Elsevier Ltd. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
3
pubmed:volume
174
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
84-90
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Recovery of motor performance deterioration induced by a demanding finger motor task does not follow cortical excitability dynamics.
pubmed:affiliation
Department of Experimental Medicine, Section of Human Physiology and Istituto Nazionale di Neuroscienze, University of Genoa, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't