Actions of the Arm muscles

Question 1

What is the function of the Anconeus?

Answer 1

to assist with extension of the forearm

Question 2

What do the Triceps brachii do?

Answer 2

Extend the forearm at the elbow (medial head always works, lateral head works if needed)

Question 3

The brachialis performs what function?

Answer 3

Flexes arm at the elbow

Question 4

Coracobrachilis does what 3 functions?

Answer 4

Flexion and weak adduction of the humerus at the shoulder and helps stabilize the GH joint

Question 5

Biceps brachii perform what 4 functions?

Answer 5

1. Flexion at the elbow
2. Supernator of the forearm (prime mover)
3. Short head adducts humerus
4. long head abducts humeus