The pectoralis major
is one of the muscles in the pectoral region of the thorax. The other muscles in this region include the pectoralis minor
and the subclavius
The pectoralis minor
lies underneath the pectoralis major, and is a much smaller muscle – hence the name.
, as the name suggests, is located under (“sub”) the clavicle (“clavius”), attaching at one end to the bottom of the clavicle. And at the other to the first rib.
The pectoralis major muscle has a few actions at the shoulder joint:
- medial rotation
There are two main parts to the pectoralis major: the clavicular part
and the sternocostal part
Gym enthusiasts spend a lot of time training their pectoral muscles using a variety of horizontal pressing movements, and movements which involve horizontal adduction of the arms. The key exercises being variations of the bench press and “flyes”.
Check out our 3D atlas
where you can visualise and interact with these muscles for yourself.
What exercises do you like to use to train your pectoral muscles?