Hemispheric Dominance for Different Aspects of Movement

Kathleen Haaland
Department of Psychiatry, University of New Mexico

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     Last modified: April 28, 2007
     Presentation date: 08/10/2007 3:15 PM in MCC
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Abstract
Although the motor system is primarily crossed with each hemisphere controlling movement primarily on the contralateral side, more subtle ipsilateral control is also present. Importantly, different aspects of movement are controlled by each hemisphere, and our results, based on studying ipsilesional reaching in stroke patients with unilateral damage, show that damage to the left hemisphere produces deficits in the movement trajectory and damage to the right hemisphere produces deficits in final position. These findings are consistent with hand preference effects in healthy right handers and with the conclusion that the left hemisphere is more important for feedforward dynamic control and the right hemisphere is more important for online control.