Paradoxical effect of digital anaesthesia on force and corticospinal excitability

Julie Duque, Yves Vandermeeren, Thierry M. Lejeune, Jean Louis Thonnard, Allan M. Smith, Etienne Olivier

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

The role played by sensory information in maintaining motor cortical representations is still incompletely understood. We investigated the effect of digital anaesthesia of the index finger and thumb on the amplitude of motor evoked potentials to transcranial magnetic stimulation (TMS) recorded from the first dorsal interosseus, F-wave response probability and maximal key pinch force. Whereas digital anaesthesia led to a 29% decrease in maximal force, both motor evoked potential amplitudes and F-wave probability remained unchanged. This dramatic decrease in maximal voluntary contraction following digital anaesthesia may result from a lack of proper sensory feedback during the task.

langue originaleAnglais
Pages (de - à)259-262
Nombre de pages4
journalNeuroReport
Volume16
Numéro de publication3
Les DOIs
Etat de la publicationPublié - 28 févr. 2005
Modification externeOui

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