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[Comment] Bionic hand transplantation: linking the cortex to the hand

Adult brachial plexus injuries are rare but devastating, and their reconstruction is constrained by the difficulty of affecting nerve regeneration, the complex internal architecture of the plexus, and the pernicious effect of delay on recovery.1 Conventional surgical reconstruction can make use of nerve grafts, nerve transfers, tendon transfers, and vascularised free functional muscle transfers. Some methods rely on the presence of viable proximal nerve stumps, which might not be present, particularly in injuries with root avulsion from the spinal cord.