Flexor Digitorum Superficialis Ring



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 ring middle phalanx

Ring Middle Phalanx

Function: flexion of the ring finger PIP joint, the MCP joint (only after flexion has been initiated) and the Wrist, weakly, along with other muscles which flex the wrist

Nerve: Median Nerve


Muscular Branches of Radial Artery
Muscular Branches of Ulnar Artery
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