Journal article
Primary sensorimotor cortex activation with task-performance after fatiguing hand exercise
Experimental Brain Research, Vol.167(2), pp.160-164
2005
Abstract
We have compared functional MRI signals in primary sensorimotor cortex (SM1) during a paced motor task of each hand before and after unimanual (right hand) fatiguing exercise. Our aims were to determine whether the degree of activation is different when a motor task is performed after a fatiguing exercise, and whether there are any differences in activation between movement of the fatigued and non-fatigued hands. There was a significant reduction in the number of voxels activated in SM1 in the hemisphere contralateral to movement of both the fatigued hand (38±5 pre-exercise versus 21±3 post-exercise; P<0.05) and the non-fatigued hand (32±4 pre-exercise vs 18±4 post-exercise; P<0.05). There was no significant difference in the magnitude of the functional magnetic resonance imaging signal before or after exercise, however, the variance increased significantly after exercise (6.0±0.5 pre-exercise vs 7.3±0.6 post-exercise; P<0.01). Reduced functional activation in SM1 may reflect increased variability in the activation rather than a reduction in activation of cortical motor networks after fatigue.
Details
- Title
- Primary sensorimotor cortex activation with task-performance after fatiguing hand exercise
- Authors/Creators
- N.M. Benwell (Author/Creator) - The University of Western AustraliaM.L. Byrnes (Author/Creator) - The University of Western AustraliaF.L. Mastaglia (Author/Creator) - The University of Western AustraliaG.W. Thickbroom (Author/Creator) - The University of Western Australia
- Publication Details
- Experimental Brain Research, Vol.167(2), pp.160-164
- Publisher
- Springer-Verlag Berlin Heidelberg
- Identifiers
- 991005544369807891
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 1 Clinical & Life Sciences
- 1.82 Gait & Posture
- 1.82.811 Transcranial Magnetic Stimulation
- Web Of Science research areas
- Neurosciences
- ESI research areas
- Neuroscience & Behavior