Random Ass Anatomy

Question 1

what does the accessory nerve innervate and what will injury of it cause?

Answer 1

innervates traps, will cause drooping down of affected shoulder and patients wont be able to abduct their arm above shoulder level

Question 2

what does the dorsal scapular nerve innervate and what will injury of it cause?

Answer 2

rhomboids; trying to retract the scapula will cause it to upwardly rotate because rhomboids cant oppose traps

Question 3

what does the long thoracic nerve innervate and what does its injury cause?

Answer 3

serratus anterior; scapular bows out at medial border - winged scapula
also - you cannot abduct your arm above shoulder level

Question 4

what does the suprascapular nerve innervate and what would injury to it cause?

Answer 4

supraspinatus and infraspinatus; weak rotator cuff - impingement may occur, inability to begin abduction

Question 5

what does the axillary nerve innervate and what will its injury do?

Answer 5

deltoid and teres minor

loss of most shoulder functions (abduction, lateral rotation, f &e weakened)

Question 6

what is Erb’s palsy?

Answer 6

stretching/traction of upper trunk - consisting of C5 and C6
can happen in delivery; adult trauma
affects: deltoid, supraspinatous, infraspinatous, biceps brachii
can no longer: abduct, flex, supinate, laterally rotate arm
so arm is stuck in this position: extended, adducted at side, medially rotated, and pronated

Question 7

in what case can the axillary nerve be damaged?

Answer 7

fracturing of the surgical neck of the humerus or anterior dislocation of the humerus

Question 8

what injury can harm the radial nerve?

Answer 8

midshaft humeral fracture

compression of axilla

Question 9

what are clinical manifestations of radial nerve injury?

Answer 9

“Saturday night palsy”
wrist drop (no elbow, wrist, finger extension)
decreased grip strength

Question 10

what injury can damage the median nerve?

Answer 10

supracondylar fracture of humerus (a proximal lesion)

Question 11

what are the clinicla manifestations of median nerve injury?

Answer 11

“pope’s blessing”

loss of wrist and lateral finger flexion

Question 12

what injury can damage the ulnar nerve?

Answer 12

fracture of medial epicondyle of humerus

Question 13

what are the clinical manifestations of ulnar nerve injury?

Answer 13

“ulnar claw”
radial deviation of wrist upon flexion
loss of flexion of wrist