Pectoral muscle

Pectoral Muscle

The pectoralis major, one of the pectoral muscles.

The Pectoral muscles are a group of muscles in the chest region of the human body. They are primarily responsible for the movement and stabilization of the shoulder joint. The group is composed of the Pectoralis Major and the Pectoralis Minor.

Anatomy

Pectoralis Major

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The pectoralis major muscle.

The Pectoralis Major is a thick, fan-shaped muscle, situated at the chest (anterior) of the human body. It makes up the bulk of the chest muscles and lies under the breast. The pectoralis major's primary functions are flexion, adduction, and internal rotation of the humerus.

Pectoralis Minor

The pectoralis minor muscle.

The Pectoralis Minor is a thin, triangular muscle, located beneath the pectoralis major. It attaches to the 3rd, 4th, and 5th ribs, and reaches to the coracoid process of the scapula. Its primary role is to stabilize the scapula.

Function

The pectoral muscles play a crucial role in many daily activities and sports. They are essential for any motion that requires pushing or lifting. In addition, they are vital for improving posture and ensuring proper function of the shoulder joint.

Clinical Significance

Injuries to the pectoral muscles are relatively rare but can be debilitating. They often occur during strenuous activities, such as weightlifting. Treatment typically involves rest, physical therapy, and in severe cases, surgery.

See Also

• Muscular system
• Chest
• Shoulder joint
• Humerus
• Scapula