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Dorsal hood

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Dorsal hood --> extensor digital expansion

a triangular tendinous aponeurosis including the tendon of the extensor digitorum centrally, interosseus tendons on each side, and a lumbrical tendon laterally. It covers the dorsal aspect of the metacarpophalangeal joint and the proximal phalanx.

Synonym: dorsal hood, extensor aponeurosis, extensor expansion.