de Morree, H.M. and Klein, C. and Marcora, S.M. (2012) Perception of effort reflects central motor command during movement execution. Psychophysiology, 49 (9). pp. 1242-1253. ISSN 0048-5772.
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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.
|Uncontrolled keywords:||perception of effort|
|Subjects:||B Philosophy. Psychology. Religion > BF Psychology
Q Science > QP Physiology (Living systems)
|Divisions:||Faculties > Social Sciences > School of Sport and Exercise Studies|
|Depositing User:||Samuele Marcora|
|Date Deposited:||06 Sep 2012 14:29|
|Last Modified:||06 Sep 2012 14:32|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/30446 (The current URI for this page, for reference purposes)|
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