GOOD MORNING

Dr vandana.

Mixed nerve (contain motor & sensory fibers) .

C 5,6,7,8 & T1.

Arises in the axilla by 2 roots (lat &med) :

1 )lat .root : from the lat . Cord of the brachial plexus .

2 )med .root : from the med . Cord of the brachial plexus .

1)Course in the arm

a) in the upper ½

b) in the middle of the arm

c) in the lower ½ of the arm

2 )At the elbow

a) in the cubital fossa

b) after leaving the cubital fossa

3 )in the forearm

4 )at the wrist

5 )In the hand

6 )Its End

1 )in the axilla & arm :

NO branches

2 )in the forearm: a) muscular branches

B) articular branch

C) anterior interosseous nerve

D) palmer cutaneous branch

E) communicating br .With the ulnar n

It gives

3 )Branches in the hand:

1 )the lat .terminal branch :

A) 3 common palmer digital branches .

B) recurrent muscular branch .

2 )the med . Terminal branch :

it gives 2common palmer brs :

-The lat. Branch .

-The med. Branch .

-Med. Terminal br.:Gives 2 palmer digital brs .

-main trunk

Supplies elbow & sup. Radioulner joint.

-ant. Interosseous

Supplies wrist & inf . Radioulner joint

-To the radial & ulnar arteries.

(1 )paralysis of the muscles supplied by it .

(2 )deformity of the hand .

(3 )loss of sensation .

( 1 )Paralysis of all muscles supplied .

(2 )loss of pronation of the forearm .

(3)weak flexion of the wrist .

(4 )loss of the flexion & opposition pf the thumb .

(1 )hyper-extended thumb .

(2 )adduction .

(3 )flat thenar eminence.

-lat. 2/3 of the palm of the hand.

-lat. 3 ½ fingers anteriorly & their distal halves posteriorly .

It is compression of median n. as it passes through the carpal tunnel .

(1 )dislocation of one of the carpal bones .

(2 )thickening of the tendons passing .

(3 )myxoedema or tumour inside the carpal tunnel .

AtrophyAtrophy