Posterior compartment of the arm

Question 1

What muscles make up the posterior compartment of the arm

Answer 1

Triceps and the Anconeus

Question 2

What nerve innervates all the muscles in the posterior arm

Answer 2

Radial nerve

Question 3

What is the origin, insertion, action and innervation of Triceps

Answer 3

Origin: 
-Long head= scapula
-Lateral head = humerus 
- Medial= humerus 
Insertion: olecranon of the ulna 

Action: extends forearm at elbow, and extends arm at shoulder

Innervation: radial nerve

Question 4

What is the origin, insertion, action and innervation of Anconeus

Answer 4

Origin: Lateral epicondyle of the humerus

Insertion: olecranon of the ulna

Action: stabilize elbow and assist triceps

Innervation: radial nerve

Question 5

What is the major artery of the arm

Answer 5

The brachial artery and its branches (profunda brachii and ulnar collaterals)

Question 6

What are the superficial veins of the arm

Answer 6

cephalic and basilic

Question 7

What are the deep veins of the arm

Answer 7

brachial veins

Question 8

What are the 2 transient nerves of the arm

Answer 8

median and ulnar