Abstract
Grasp and release has been provided to both upper extremities of subjects with tetraplegia using percutaneous and fully implanted stimulation. This is to determine quantitatively the performance of these subjects in three bimanual tests using two handed stimulation. Their performance here is compared with two separate cases: the same tests using single handed stimulation assisted by a nonstimulated hand and using two unstimulated hands. It was found that bilateral stimulation significantly improved the efficacy of performing the bimanual tests assessed over that using unilateral stimulation assisted by the nonstimulated hand (in two of three tests) or no stimulation three of three tests). These results show quantitative evidence of the benefits of providing bilateral stimulation for the completion of bimanual tasks for persons with tetraplegia who are appropriate candidates for stimulated grasp. These benefits were observed especially in cases where the ability of the subject in completing the task using unilateral stimulation was not strong.
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