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The Flexor Digitorum Superficialis is the only muscle in the Intermediate Layer of the Anterior Forearm Compartment.
The Flexor Digitorum Superficialis has two heads: Humeroulnar and Radial.
- Medial epicondyle of the humerus via the common flexor belly/tendon to the anterior surfaces of fingers #2-5 (index, middle, ring, little).
- Flexes fingers #2-5 at the metacarpophalangeal and proximal interphalangeal joints.
- Flexes the hand at the wrist joint.
- Flexes the forearm at the elbow joint.
- The flexor digitorum superficialis is one of five muscles of the common flexor belly/tendon that is involved with medial elbow tendinopathy (aka golfer’s elbow).
- The distal tendons of the flexor digitorum superficialis split to allow passage through them of the distal tendons of the flexor digitorum profundus.
- The distal tendons of the flexor digitorum superficialis run through the carpal tunnel and can be involved with carpal tunnel syndrome.