Origin:
HUMERAL head from the common flexor tendon origin at the medial epicondyle
ULNAR head from the coronoid process of the Ulna
RADIAL head from the oblique line of the Radius and from the superficialis arch
Insertion: radial and ulnar palmar margins of the index finger Middle Phalanx
Function: flexion of the index PIP joint, index MCP joint (only after flexion has been initiated) and the Wrist, weakly, along with other muscles which flex the wrist
Nerve: Median Nerve
Artery: Muscular Branches of Radial Artery and Muscular Branches of Ulnar Artery