On the nature of the interhemispheric effects of fatigue |
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| Authors: | S J Dimond J G Beaumont |
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| Affiliation: | 1. Department of Rehabilitation Medicine, Qingdao University, Qingdao, China;2. Department of Rehabilitation Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China;3. Institute of Special Medicine, School of Basic Medical, Qingdao University, Qingdao, China;1. Science Policy Research Unit (SPRU), Jubilee Building, University of Sussex, Brighton BN1 9QE, UK;2. Sustainable Consumption Institute, Manchester Institute of Innovation Research, Manchester Business School, University of Manchester, UK;3. King Abdulaziz University, Jeddah, Saudi Arabia;1. Maisonneuve-Rosemont Hospital Research Center, University of Montreal Affiliated Research Center, Montréal, QC, Canada;2. Faculty of Medicine, School of Rehabilitation, University of Montréal, Montréal, QC, Canada;3. Center for Interdisciplinary Research in Rehabilitation and Social Integration (CIRRIS), Québec, QC, Canada;4. Faculty of Medicine, Department of Rehabilitation, Université Laval, Québec, QC, Canada;5. Faculty of Health, Dalhousie University, Halifax, NS, Canada;6. Canada Research Chair in Shared Decision Making and Knowledge Translation, Université Laval, Faculty of Medicine, Québec, QC, Canada |
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| Abstract: | The possibility that different levels of fatigue could be maintained independently at each hemisphere was examined by projecting a continuous task to one hemisphere by a divided visual field technique. Occasional test stimuli were flashed to both hemispheres. The extended response times observed at the task hemispheres were not observed at the opposite hemisphere. When both task and test stimuli are all flashed to the same hemisphere, fatigue spreads to test stimuli at different locations in the left hemisphere, but not in the right. The response times of left-handed subjects are longer than those of right-handed. The results suggest that there is no transfer of fatigue from one hemisphere to the other, that the hemispheres deal differently with the demands made upon them, and that the brain of the left-hander has a reduced capacity to sustain performance. |
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