Hosted on MSN1mon
The best pec workouts for a stronger and well-defined chest
The pectoralis major has two heads: the sternocostal head and the clavicular head. These two heads help you move your arms in different directions, and as one head contracts, the other relaxes.
BMJ3mon
Pectoralis major tendon ruptures: when to operate
The pectoralis major is an extremely powerful adductor ... It has an unusual humeral insertion in that the clavicular and upper sternal fibres attach distally on the humerus, while the lower sternal ...