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median nerve
Origin:
- Nerve root: brachial plexus (C6-T1)
Efferents:
1) muscles of the forearm
a) all, EXCEPT
1] flexor carpi ulnaris
2] ulnar 1/2 of flexor digitorum profundus
b) action
1] abduction of wrist
2] pronation of hand
3] radial flexion
2) muscles of the hand
a) thenar muscles, EXCEPT
1] adductor pollicis
2] deep head of flexor pollicis brevis
b) action
1] opposition of thumb
2] flexion of index & middle fingers
3] abductor pollicis brevis
4] flexor pollicis brevis
Afferents:
- sensory
- 1st 3 1/2 fingers
- thumb
- index finger
- middle finger
- 1/2 of ring finger
Pathology:
- injury:
a) brachial plexus
b) elbow
c) carpal tunnel syndrome
Related
carpal tunnel syndrome (median neuropathy)
General
peripheral nerve
References
- B. Ourmazdi, M.D. Synopsis of Neurology & Examination,
B & B Books, Saratoga, CA, 1998
- Stedman's Medical Dictionary 27th ed, Williams &
Wilkins, Baltimore, 1999
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