Abstract：
:To investigate the capacity of the central nervous system to integrate and differentiate two different muscular fatigue states, the present study examines the changes on multi-joint movement organization following muscular fatigue of elbow extensor muscles (triceps brachii) induced by voluntary versus electrically induced contractions. Twenty right-handed male volunteers performed throws in the horizontal plane before and after two fatiguing procedures. First, success rate of throws was not affected by fatigue neither after voluntary contractions, nor after electrically induced contractions. Despite similar reductions of the maximal voluntary isometric force and the median frequency of the electromyographic signal following both fatiguing protocols, voluntary contractions induced greater changes in muscle activation, kinematics and kinetics during throws than electrically induced contractions. The changes observed following voluntary contractions are interpreted as a compensatory strategy involving a greater contribution of the wrist. In contrast, the greater activation of the triceps brachii could compensate the weakness of this muscle induced by fatigue without any modification of the initial multi-joint movement organization.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Huffenus AF,Forestier Ndoi
10.1016/j.neulet.2006.04.025subject
Has Abstractpub_date
2006-07-31 00:00:00pages
109-13issue
1-2eissn
0304-3940issn
1872-7972pii
S0304-3940(06)00411-3journal_volume
403pub_type
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