Flexor Pollicis Brevis

Images: Thenar atrophy


Origin: transverse carpal ligament and the Trapezium

Insertion: radial proximal base of the Thumb Proximal Phalanx and the thumb Radial MCP Sesamoid

Function: Flexes the thumb MCP joint and flexes/pronates the basal joint along with other muscles which produce thumb opposition


DEEP head: Motor Branch of Ulnar Nerve

SUPERFICIAL Head: Motor Branch of Median Nerve

Artery: Superficial Volar Branch of Radial artery

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