Anatomy: USMLE Q No. 10

[Cardiac Arrest]

During an assault, a 19-year-old man sustains a knife wound to the axilla that injures the brachial plexus. If the injury to the plexus occurred at the site indicated in the diagram "See Attachment", which muscle would be likely to show a functional deficit?

A. Biceps brachii
B. Infraspinatus
C. Palmar interossei
D. Pronator teres
E. Supinator

[dr-kenzy]

salam ..

the answer is :

C. Palmar interossei ( BY ULNAR N ( C8 , T1 ) ..

cuz :

in A. Biceps brachii >> supplied by musculocutaneous N ( C5 , C 6 ) ..

in B. Infraspinatus >> supplied by suprascapular N ( C5 , C6 ) ..

in D. Pronator teres >> supplied by median N ( C6 , C7 ) ..

in E. Supinator >> supplied by deep branch of radial N ( C5 , T1 )..

[BaBiNa]

Salam Sweet Members

The answer is C

Palmar interossei is supply by deep branch of ulnar nerve ( C8 & T1)