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Flexor Digitorum Superficialis

Flexor Digitorum Superficialis

Description

Origin :

  • Humoulnar head: Medial epicondyle of humerus
  • ulnar collateral ligament and coronoid process of ulna.
  • Radial head: Superior half of anterior border of radius.

Insertion :

  • Bodies of middle phalanges of medial four digits.

Innervation :

  • Median nerve (C7, C8 and T1).

Arterial Supply :

  • Ulnar artery.

Depth :

  • Superficial

Action

Action :

  • Flexes middle phalanges at proximal interphalangeal joints of medial four digits.
  • Acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints and hand.
Target Muscles Target MusclesFlexes middle phalanges at proximal interphalangeal joints of medial four digits. Acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints and hand.