median nerve

Origin

• Nerve root: brachial plexus (C6-T1)

Afferents

• sensory
  • 1st 3 1/2 fingers
    • thumb
    • index finger
    • middle finger
    • 1/2 of ring finger

Efferents

• muscles of the forearm
  • all, EXCEPT
    • flexor carpi ulnaris
    • ulnar 1/2 of flexor digitorum profundus
  • action
    • abduction of wrist
    • pronation of hand
    • radial flexion
• muscles of the hand
  • thenar muscles, EXCEPT
    • adductor pollicis
    • deep head of flexor pollicis brevis
  • action
    • opposition of thumb
    • flexion of index & middle fingers
    • abductor pollicis brevis
    • flexor pollicis brevis

Pathology

• injury:
  • brachial plexus
  • elbow
  • carpal tunnel syndrome

More general terms

• peripheral nerve

Additional terms

• carpal tunnel syndrome (median neuropathy)