median nerve
TRANSCRIPT
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GOOD MORNING
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Dr vandana.
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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 .
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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
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5 )In the hand
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6 )Its End
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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
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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 .
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-Med. Terminal br.:Gives 2 palmer digital brs .
-main trunk
Supplies elbow & sup. Radioulner joint.
-ant. Interosseous
Supplies wrist & inf . Radioulner joint
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-To the radial & ulnar arteries.
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(1 )paralysis of the muscles supplied by it .
(2 )deformity of the hand .
(3 )loss of sensation .
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( 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 .
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(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 .
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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 .
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AtrophyAtrophy
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