Thursday, November 20, 2008

median nerve:-motor innervation.

Motor innervation

The nerve innervates most of the flexor muscles of the forearm with the exception of the flexor carpi ulnaris and the medial two digits of the flexor digitorum profundus, which are supplied by the ulnar nerve

Unbranched, the median nerve supplies the following muscles:

  • Pronator teres
  • Flexor carpi radialis
  • Palmaris longus
  • Flexor digitorum superficialis

The anterior interosseus branch supplies the following muscles:

  • Lateral (radial) half of the Flexor digitorum profundus
  • Flexor pollicis longus
  • Pronator quadratus

In the hand, the median nerve provides innervation to:

  • 1st and 2nd lumbricals
  • Thenar muscles: Abductor pollicis brevis, Flexor pollicis brevis, Opponens pollicis

Contributing spinal nerve roots

C5, C6, C7, C8, T1

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