Studying Electromyographic Activity in Patients With Upper Limb Amputations

Inclusion criteria: * For the prosthetic control graft arm: * Must have previously undergone upper limb amputation * Must be otherwise healthy (e.g. no severe pain syndromes or untreated mental health disorders) * Must be American Society of Anesthesiologists (ASA) Class I (low surgical risk) * Must have sufficient soft tissue quality to support performance of the operative procedures * Must have NOT previously received the partial muscle graft surgery * For the neuroma graft arm: * Must have previously undergone upper limb amputation * Must be otherwise healthy (e.g. no severe pain syndromes or untreated mental health disorders) * Must have previously received the partial muscle graft surgery * For the able-bodied arm: * Must have NOT undergone upper limb amputation * Must be in good health Exclusion criteria: * For the prosthetic control graft arm: * Participants sustaining severe crushing or avulsion injuries with substantial superficial and deep scarring, may not be appropriate candidates for inclusion in the study * For the able-bodied arm: * Participants with a history of nerve pain may not be appropriate candidates for inclusion in the study