Origin

Median epicondyle of the humerus (common flexor tendon) as well as parts of the radius and ulna

Insertion

Phalanges

Action(s)

Flexor of fingers (primarily at proximal interphalangeal joints)

Nerve Supply

Median nerve

Arterial Supply

Ulnar artery

Physical Exam

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Clinical Importance

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Disease States

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Discussion

The primary function of flexor digitorum superficialis is flexion of the middle phalanges of the fingers at the proximal interphalangeal joints, however under continued action it also flexes the metacarpophalangeal joints and wrist joint.

To test flexor digitorum superficialis, one finger is flexed at the proximal interphalangeal joint against resistance, while the remaining three fingers are held fully extended (to inactive flexor digitorum profundus).

Figures

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From Wikipedia:
Flexor digitorum superficialis

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