Which one of the following muscles is involved in abduction of the arm at the shoulder joint?
A) deltoid
B) biceps brachii
C) triceps brachii
D) latissimus dorsi
E) pectoralis major

Question

Quizplus · Accepted Answer

The deltoid muscle is responsible for abduction of the arm at the shoulder joint. It is the main muscle involved in lifting the arm away from the body. The other muscles listed are not primarily involved in abduction at the shoulder joint.

Which One of the Following Muscles Is Involved in Abduction