FLEXOR DIGITORUM SUPERFICIALIS
| ORIGIN Humeral head: common flexor origin of medial epicondyle humerus, medial ligament of elbow. Ulnar head: medial border of coronoid process and fibrous arch. Radial head: whole length of anterior oblique line |
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| INSERTION Tendons split to insert onto sides of middle phalanges of medial four fingers |
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| ACTION Flexes proximal interphalangeal joints and secondarily metacarpophalangeal joints and wrist |
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| NERVE Median nerve (C7, 8) (from medial and lateral cords) |