Structures

  • Flexor digitorum profundus
  • Flexor pollicis longus
  • Pronator quadratus

MuscleActionOriginInsertionInnervationBlood supply
Flexor digitorum profundus- Flexion of distal interphalangeal joints of digits 2-5
- Flexion of metacarpophalangeal joints of digits 2-5
- Flexion of the wrist
- Medial and anterior ulna and interosseous membrane- Four tendons attach to the palmar surface of the distal phalanges of digits 2-5- Lateral half: median nerve (anterior interosseous nerve)
- Medial half: ulnar nerve: C8,T1
- Ulnar artery
- Anterior interosseous artery
Flexor pollicis longus- Flexion of interphalangeal joint of thumb- Anterior surface of radius
- Radial half of interosseous membrane
- Palmar surface of base of distal phalanx of thumb- Median nerve (anterior interrosseous nerve): C7,8 - Anterior interosseous artery
Pronator quadratus- Pronation of forearm
- Distal anterior surface of ulna- Distal anterior surface of radius- Median nerve (anterior interosseous nerve): C7,8- Anterior interosseous artery