Musculoskeletal Study Guide

Question 1

What nerve root innervates proximal upper limb muscles and sensory to lateral upper arm?

Answer 1

C5

Question 2

What nerve root innervates flexion of the forearm?

Answer 2

C6

Question 3

What nerve root innervates extension of the forearm?

Answer 3

C7

Question 4

What nerve root innervates hand muscles and sensory to medial forearm to little finger?

Answer 4

T1

Question 5

What nerve root innervates flexion of the fingers?

Answer 5

C8

Question 6

The anterior branches innervate…

Answer 6

flexion

Question 7

The posterior branches innervate…

Answer 7

extension

Question 8

What are the superior boundaries of the scapula?

Answer 8

outer border of the first rib
superior border of the scapula
posterior border of the clavicle

Question 9

What are the anterior boundaries of the axilla?

Answer 9

pectoralis major and pectoralis minor

anterior axillary fold

Question 10

What are the posterior boundaries of the axilla?

Answer 10

subscapularis, teres major, latissimus, posterior axillary fold

Question 11

What are the medial boundaries of the axilla?

Answer 11

rib cage and serratus anterior

Question 12

What are the lateral boundaries of the axilla?

Answer 12

intertubercular sulcus

Question 13

What is the floor of the axilla?

Answer 13

the armpit

Question 14

What are the contents of the axilla?

Answer 14

axillary artery
axillary vein
divisions, cords, and branches of the brachial plexus
lymphatics and nodes
tail of the breast
short head of the biceps brachii and Coracobrachialis

Question 15

75% of lymph drainage from the breast drains into…

Answer 15

the axilla

Question 16

Describe innervation to the shoulder

Answer 16

CN XI

Brachial plexus roots give rise to the long thoracic nerve

Question 17

What nerve innervates the serratus anterior muscle?

Answer 17

long thoracic nerve

Question 18

What nerve is damaged in a winged scapula?

Answer 18

the long thoracic nerve (innervates the serratus anterior)