Pectoralis Major Muscle: Structure, Function & Diseases
The pectoralis major muscle is the large chest muscle. It participates in motor control of the arm (internal rotation, adduction, anteversion) and as an accessory muscle in respiration. In Poland syndrome, a rare dysplasia, the pectoralis major muscle may be completely absent or underdeveloped. What is the pectoralis major muscle? The pectoralis major muscle is … Pectoralis Major Muscle: Structure, Function & Diseases