First Palmar Interosseous


Origin: ulnar shaft of the index metacarpal

Insertion: ulnar base of the index proximal phalanx and index ulnar digital extensor mechanism

Function: flexes, ulnarly deviates (adducts) and supinates the index MCP joint and extends the index PIP and DIP joints

Nerve: Motor Branch of Ulnar Nerve

Artery: Deep Palmar Arch

Interossei - all

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