Perception of effort reflects central motor command during movement execution

de Morree, Helma M. and Klein, Christoph and Marcora, Samuele Maria (2012) Perception of effort reflects central motor command during movement execution. Psychophysiology, 49 (9). pp. 1242-1253. ISSN 0048-5772. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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It is thought that perception of effort during physical tasks is the conscious awareness of the central motor command sent to the active muscles. The aim of this study was to directly test this hypothesis by experimentally varying perception of effort and measuring movement-related cortical potential (MRCP). Sixteen healthy, recreationally active men made unilateral dynamic elbow flexions to lift a light (20% one repetition maximum, 1RM) and a heavier (35% 1RM) weight with a fatigued arm and a nonfatigued arm while rating of perceived effort (RPE), biceps brachii electromyogram (EMG), and MRCP were recorded. RPE, EMG amplitude, and MRCP amplitude at Cz during weight raising increased with weight and with muscle fatigue. There was a significant correlation between RPE and MRCP amplitude at the vertex during the weight raising epoch. This study provides direct neurophysiological evidence that perception of effort correlates with central motor command during movement execution.

Item Type: Article
Uncontrolled keywords: perception of effort
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Q Science > QP Physiology (Living systems)
Divisions: Faculties > Science Technology and Medical Studies > School of Sport and Exercise Sciences
Depositing User: Samuele Marcora
Date Deposited: 06 Sep 2012 14:29
Last Modified: 17 Feb 2015 14:33
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