The greater pectoral muscle, also known as the pectoralis major, is a large, fan-shaped muscle located in the anterior (front) part of the chest region. It is one of the key muscles in the upper body, contributing to various movements involving the shoulder joint and the upper arm.
Originating from the clavicle (collarbone), the sternum (breastbone), and the cartilage of the ribs, specifically the first through sixth ribs, the greater pectoral muscle forms a prominent bulk in the chest. It inserts into the humerus (upper arm bone) through a tendon called the pectoralis major tendon.
This muscle plays a vital role in several upper body movements, such as adduction (bringing the arm closer to the body), flexion (moving the arm forward), and medial rotation (inward rotation of the upper arm). It is responsible for many common actions, including pushing, pressing, throwing, and hugging.
Due to its size and location, the greater pectoral muscle is often targeted during strength training exercises to enhance chest definition, upper body power, and overall upper body aesthetics. It is also frequently engaged during activities such as weightlifting, swimming, and certain sports that involve throwing or pushing motions.
Overall, the greater pectoral muscle is an essential muscle in the upper body, contributing to various movements and providing strength and stability to the chest and shoulder region.
