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