Use of a brain–computer interface in patients with hand plegia after stroke
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Rehabilitation of patients with nonexistent residual hand motor function after stroke is extremely difficult, as most rehabilitative interventions require the patient to perform actions with the affected hand and are, therefore, effective only in those with a moderate degree of residual function. Brain–computer interface (BCI) systems, which translate a measurable neurophysiological signal into an effector action, might be useful in these patients. Buch et al. have recently reported the use of a BCI system that uses magnetoencephalographic activity, recorded when a patient intends to move a completely paralyzed hand, to control grasping motions of a mechanical orthosis attached to the affected hand.
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