hypothenar eminence

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    Cards (4)

    • Abductor Digiti Minimi:
      Most superficial of hypothenar muscles
      O: Pisiform, pisohamate and pisometacarpal ligaments and tendon of FCU
      R: Distally
      I: Medial side proximal phalanx of 5th finger and DDE
      A: Abducts 5th finger; assists flexion of 5th MCP joint
      NS: Deep branch ulnar nerve (C(7), 8, T1)
    • Flexor Digiti Minimi Brevis:
      O: Hook of hamate and flexor retinaculum
      R: Distally
      I: Base proximal phalanx of 5th finger
      A: Flexes 5th MCP joint
      NS: Deep branch ulnar nerve (C(7), 8, T1)
    • Opponens Digiti Minimi: Deep to abductor digiti minimi
      O: Hook of hamate and flexor retinaculum
      R: Distally
      I: Medial aspect 5th MC
      A: Opposition of 5th finger
      NS: Deep branch ulnar nerve (C7-T1)
    • Palmaris Brevis:
      O: Medial border of palmar aponeurosis and front of flexor retinaculum
      R: Medially
      I: Skin on medial border of hand
      A: Wrinkles skin on medial aspect of hand and assists thumb in producing a good grip
      NS: Superficial branch ulnar nerve (C(7), 8, T1)
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