Corticomotor excitability during precision motor tasks

Pearce, Alan J. and Kidgell, Dawson J. 2009, Corticomotor excitability during precision motor tasks, Journal of science and medicine in sport, vol. 12, no. 2, pp. 280-283.

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Title Corticomotor excitability during precision motor tasks
Author(s) Pearce, Alan J.
Kidgell, Dawson J.
Journal name Journal of science and medicine in sport
Volume number 12
Issue number 2
Start page 280
End page 283
Total pages 4
Publisher Elsevier Australia
Place of publication Chatswood, N.S.W.
Publication date 2009-03
ISSN 1440-2440
1878-1861
Keyword(s) transcranial magnetic stimulation
motor evoked potentials
motor skills
motor cortex
Summary The aim of this preliminary study was to investigate motor cortex (cortical) excitability between a similar fine visuomotor task of varying difficulty. Ten healthy adults (three female, seven male; 20–45 years of age) participated in the study. Participants were instructed to perform a fine visuomotor task by statically abducting their first index finger against a force transducer which displayed the level of force (represented as a marker) on a computer monitor. This marker was to be maintained between two stationary bars, also displayed on the computer monitor. The level of difficulty was increased by amplifying the position of the marker, making the task more difficult to control. Cortical measures of motor evoked potential (MEP) and silent period (SP) duration in first dorsal interosseous (FDI) muscle were obtained using transcranial magnetic stimulation (TMS) while the participant maintained the “easy” or “difficult” static task. An 11.8% increase in MEP amplitude was observed when subjects undertook the “difficult” task, but no differences in MEP latency or SP duration. The results from this preliminary study suggest that cortical excitability increases reflect the demand required to perform tasks requiring greater precision with suggestions for further research discussed.
Language eng
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, Sports Medicine Australia
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017582

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