course and landmark of median nerve

course and landmark of the median nerve

1. COURSE AND LANDMARKS OF MEDIAN NERVE TEJAS D ROLL NO 122

2. The median nerve is a major  peripheral nerve  of the upper limb. Nerve roots :  C6 – T1.  The median nerve is derived from the  medial  and  lateral  cords of the brachial plexus.

3. After originating from the brachial plexus in the  axilla , the median nerve descends down the arm, initially lateral to the  brachial artery . Halfway down the arm, the nerve crosses over the brachial artery, and becomes situated medially . The median nerve enters the anterior compartment of the forearm through the cubital fossa .

4. In the forearm, the nerve travels between the flexor digitorum profundus and flexor digitorum superficialis muscles. The median nerve gives rise to two major branches in the forearm: Anterior interosseous nerve  – Supplies the deep muscles in the anterior forearm. Palmar cutaneous nerve  – Innervates the skin of the lateral palm.

5. The median nerve enters the hand via the  carpal tunnel,  where it terminates by dividing into two branches: Recurrent branch  – Innervates the thenar muscles. Palmar digital branch  – Innervates the palmar surface and fingertips of the lateral three and half digits. Also innervates the lateral two lumbrical muscles.

6. LANDMARKS OF MEDIAN NERVE RUNS BETWEEN BICEPS AND BRACHIALIS ALONGSIDE THE BRACHIAL ARTERY AND THE ULNAR NERVE.  CUBITAL FOSSA DIVES BETWEEN THE TWO HEADS OF PRONATOR TERES  ANTERIOR INTEROSSEOUS NERVE ENDS HERE SUPPLYING LATERAL 2 AND HALF DEEP FLEXOR MUSCLES.   PALMAR CUTANEOUS BRANCH OF THE MEDIAN NERVE GOES UP AND OVER THE CARPAL TUNNEL MEDIAN NERVE THROUGH CARPAL TUNNEL

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