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Flexor Pollicis Brevis 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 Nerve: DEEP head: Motor Branch of Ulnar Nerve SUPERFICIAL Head: Motor Branch of Median Nerve Artery: Superficial Volar Branch of Radial artery  |
American Society for Surgery of the Hand assh.org The Best Resource For Your Hands, Period. |