The pectoral muscles are primarily associated with which movement?

• A. Raise arms up, sideways, and across chest at the shoulders
• B. Lower the arms
• C. Rotate the hips
• D. Move the jaw

Answer: (A)

The pectoral muscles (pectoralis major) move the arm at the shoulder toward the midline and across the chest, and they assist in lifting the arm forward. This means flexing the shoulder and performing horizontal adduction (moving the arm across the chest) as well as inward rotation. The description that involves raising the arms up and moving them across the chest at the shoulders aligns with these movements, making it the best match.

Lowering the arms is dominated by opposite actions of these muscles; rotating the hips involves hip muscles, and moving the jaw involves muscles of mastication, not the chest.