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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Repetitive transcranial magnetic stimulation attenuates the perception of force output production in non-exercised hand muscles after unilateral exercise
PLoS ONE, Volume 8, No. 11, Article e80202, Year 2013
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Description
We examined whether unilateral exercise creates perception bias in the non-exercised limb and ascertained whether rTMS applied to the primary motor cortex (M1) interferes with this perception. All participants completed 4 interventions: 1) 15-min learning period of intermittent isometric contractions at 35% MVC with the trained hand (EX), 2) 15-min learning period of intermittent isometric contractions at 35% MVC with the trained hand whilst receiving rTMS over the contralateral M1 (rTMS+EX); 3) 15-min of rTMS over the 'trained' M1 (rTMS) and 4) 15-min rest (Rest). Pre and post-interventions, the error of force output production, the perception of effort (RPE), motor evoked potentials (MEPs) and compound muscle action potentials (CMAPs) were measured in both hands. EX did not alter the error of force output production in the trained hand (Δ3%; P>0.05); however, the error of force output production was reduced in the untrained hand (Δ12%; P<0.05). rTMS+EX and rTMS alone did not show an attenuation in the error of force output production in either hand. EX increased RPE in the trained hand (9.1±0.5 vs. 11.3±0.7; P<0.01) but not the untrained hand (8.8±0.6 vs. 9.2±0.6; P>0.05). RPE was significantly higher after rTMS+EX in the trained hand (9.2±0.5 vs. 10.7±0.7; P<0.01) but ratings were unchanged in the untrained hand (8.5±0.6 vs. 9.2±0.5; P>0.05). The novel finding was that exercise alone reduced the error in force output production by over a third in the untrained hand. Further, when exercise was combined with rTMS the transfer of force perception was attenuated. These data suggest that the contralateral M1 of the trained hand might, in part, play an essential role for the transfer of force perception to the untrained hand. © 2013 Goodall et al.
Authors & Co-Authors
Goodall, Stuart
United Kingdom, Newcastle
University of Northumbria
Gibson, Alan St Clair
United Kingdom, Newcastle
University of Northumbria
Voller, Bernhard
Austria, Vienna
Medizinische Universität Wien
Lomarev, Mikhail P.
Russian Federation, Saint Petersburg
V. M. Bekhterev National Medical Research Center of Psychiatry and Neurology
Howatson, Glyn
United Kingdom, Newcastle
University of Northumbria
South Africa, Potchefstroom
North-west University
Dang, Nguyet
United States, Bethesda
National Institute of Neurological Disorders and Stroke
Hortobágyi, Tibor
Netherlands, Groningen
Universitair Medisch Centrum Groningen
HALLETT, MARK
United States, Bethesda
National Institute of Neurological Disorders and Stroke
Statistics
Citations: 10
Authors: 8
Affiliations: 6
Identifiers
Doi:
10.1371/journal.pone.0080202
e-ISSN:
19326203