Video 3. demonstrates performing a targeted muscle reinnervation coaptation. Due to the significant size difference between the motor nerve and the recipient’s nerve, we aim to match the size of the donor nerve with the nerve branch to the muscle at approximately a 2:1 ratio. This video shows the sciatic nerve being split into 3-4 bundles of fascicles. Using a nerve stimulator, we confirm the passage of electrical current across the coaptation and observe muscle contraction. To minimize collateral neural sprouting, we will then wrap the coaptation with a vascularized muscle flap.

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