Posterior Compartment Muscles

Question 1

3 heads

O: long- infraglenoid tubercle of scapula
Lat- lateral surface of post part of humerus
Med- medial surface of post of humerus

I- olecranon process of ulna

A- extend the forearm, extension of humerus

Answer 1

Triceps brachii

Question 2

Small muscle in the elbow

O: lateral epicondyle of humerus

I: inf surface of olecranon of ulna

A: extends the forearm

Answer 2

Anconeus