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Postexercise facilitation of motor evoked potentials elicited by ipsilateral voluntary contraction
Author(s) -
BrasilNeto Joaquim P.,
Araújo Valéria P.,
Carneiro Cláudio R.
Publication year - 1999
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(199912)22:12<1710::aid-mus14>3.0.co;2-8
Subject(s) - transcranial magnetic stimulation , facilitation , motor cortex , neuroscience , primary motor cortex , physical medicine and rehabilitation , psychology , silent period , stimulation , medicine
Motor evoked potentials (MEPs) to transcranial magnetic stimulation (TMS) increase in amplitude when obtained immediately after a period of exercise of the target muscle (postexercise facilitation). We studied postexercise facilitation of MEPs to TMS after periods of voluntary activation of either the ipsilateral or contralateral primary motor cortex (simple finger movements) or supplementary motor area (complex finger movements). Postexercise facilitation of the first dorsal interosseous MEPs occurred ipsilaterally even after simple, unilateral finger movements of the dominant hand. The findings are taken to suggest transcallosal transfer of excitability from the dominant to nondominant cerebral hemisphere, perhaps related to mechanisms involved in bimanual motor coordination. © 1999 John Wiley & Sons, Inc. Muscle Nerve 22: 1710–1712, 1999