Posterior Muscles of the Arm

Question 1

Triceps Brachii

Answer 1

O-Long: infraglenoid tubercle- scapula
Lateral: posterior surface of humerus, superior to radial groove
Medial: posterior surface of humerus, inferior to radial groove
I-Proximal end of olecranon of ulna and fascia of forearm
N-Radial nerve
A-Extend forearm

Question 2

Anconeus

Answer 2

O-Lateral epicondyle of humerus
I-Lateral surface of olecranon and superior part of posterior surface of ulna
N-Radial nerve
A-Assists in extending forearm, stabilizes elbow joint