Muscle Chart: Flexor-Pronator Group - Intermediate Layer

Question 1

Flexor Digitorum Superficialis (FDS)

Origin, Insertion, Innervation, Blood Supply

Answer 1

Origin: Humeroulnar Head — Medial epicondyle of humerus, coronoid process of ulna; Radial Head — Superior half of anterior border

Insertion: Shaft of middle phalanges of digits 2-5

Innervation: Median nerve (C7, C8, T1)

Blood Supply: Ulnar artery

Question 2

Flexor Digitorum Superficialis (FDS) Movements

Answer 2

Flexes 2nd through 5tj fingers at metacarpophalangeal (MCP) joint and proximal interphalangeal (PIP) joint, flexes wrist/hand