Structures

  • Flexor digitorum superficialis
  • Flexor digitorum profundus
  • Lumbricals
  • Flexor digiti minimi brevis
  • Flexor pollicis longus
  • Flexor pollicis brevis
MuscleActionOriginInsertionInnervationBlood supply
Flexor digitorum superficialis- Flexion of proximal interphalangeal joints of digits 2-5
- Flexion of metacarpophalangeal joints of digits 2-5
- Flexion of the wrist
- Humero-ulnar head: medial epicondyle of humerus, ulna collateral ligament and coronoid process of ulna.
- Radial head: proximal half of border of radius
- Four tendons attach to the palmar surface of the middle phalanges of digits 2-5- Median nerve: C7,8, T1- ulnar artery
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
Lumbricals- Flexion of metacarpophalangeal joints
- Extend interphalangeal joints
- Tendons of Flexor digitorum profundus- Extensor expansions of digits 2-5- medial two: deep branch of ulnar nerve
- Lateral two by digital branches of median nerve
- Superficial Palmar arch
- Common Palmar digital artery
- Deep Palmar arch
- Dorsal digital artery
Flexor digiti minimi brevis- Flexes proximal phalanx of little finger- Hook of hamate
- Flexor retinaculum
- Medial Base of proximal phalanx of little finger- Deep branch of ulnar nerve: C8,T1- Ulnar 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
Flexor pollicis brevis- Flexes thumb- Flexor retinaculum
- Tubercles of scaphoid and trapezium
- Lateral Base of proximal phalanx of thumb- Reccurent branch of median nerve: C8,T1- Superficial Palmar branch of the radial artery