rintalihasryhmän

Rintalihasryhmän refers to the group of muscles located in the chest. These muscles are primarily responsible for moving the arms and the shoulder joint. The main muscles within this group are the pectoralis major and pectoralis minor. The pectoralis major is the larger, fan-shaped muscle that forms the bulk of the chest. It originates from the clavicle, sternum, and the upper ribs and inserts into the humerus, the bone of the upper arm. Its main actions include flexion, adduction, and medial rotation of the arm. The pectoralis minor is a smaller, triangular muscle located beneath the pectoralis major. It originates from the third to fifth ribs and inserts onto the coracoid process of the scapula, playing a role in depressing and stabilizing the scapula. Together, these muscles are crucial for a wide range of upper body movements, including pushing, pulling, and reaching. They are also important for breathing, particularly during forced exhalation, as they can help lift the rib cage. Exercises targeting the rintalihasryhmän are common in strength training and include activities like push-ups, bench presses, and chest flyes.