Dorsal Interossei

Cards (6)

  • Dorsal Interossei:
    • 4 bipennate muscles
  • O (origin):
    • Sides of adjacent metacarpals
    A) Dorsal Interossei
  • R (direction):
    • Distally
    A) Dorsal Interossei
  • I (insertion):
    • Dorsal digital expansions and bases of proximal phalanges of digits 24
    A) Dorsal Interossei
  • A (action):
    • Abduction and flexion of metacarpophalangeal joints of digits 2 - 4
    • Extension of interphalangeal joints (through dorsal digital expansion)
    A) Dorsal Interossei
  • NS (nerve supply):
    • Deep branch ulnar nerve (C7 - T1)
    A) Dorsal Interossei