Important Upper Extremity INFO

Question 1

injury to the surgical neck of the humerus can hurt which nerve and artery?

Answer 1

posterior circumflex humeral artery and axillary N

Question 2

deep brachial A and deep brachial artery can be hurt if the humerus is broken where?

Answer 2

midshaft

Question 3

supracondylar fracture often affects which nerve?

Answer 3

median

Question 4

Tendonsynovitis of the thumb involves what muscle ?

Answer 4

flexor pollicis longus m. Or RADIAL BURSA

Question 5

what arch prevents displacement of the humerus?

Answer 5

coracoacromial arch with coracoacromial ligament - prevents superior displacement of humerus.

ligament is very strong, so instead of being damaged it can cause inflammation of tendon of supraspinatous muscle as tendon passes back and forth under ligament

Question 6

what artery accompanies the ulnar nerve?

Answer 6

superficial ulnar collateral artery

Question 7

is the head of the humerus more likely to be displaced inferiorly or anteriorly?

Answer 7

inferiorly (also anteriorly but less)

Question 8

if one shoulder droops lower than the other, what first layer muscle could have a problem?

Answer 8

trapezius bc upper fibers lift up scapula (aren’t working)

Question 9

fracture of the surgical neck of the humerus often injures what nerve?

Answer 9

axillary N (leads to issues in deltoid m. and teres minor m.)

Question 10

in clavicle fractures, is the subclavian artery or subclavian vein more likely to be injured?

Answer 10

vein bc it’s superficial to artery

Question 11

Over what muscle can you feel the radial pulse?

Answer 11

Flexor carpi radialis