The interspinous pectoral muscles are a group of muscles that are located between the ribs and the spine. It is involved in the movement of the chest and allows you to breathe deeply and freely.
The medullary pectoralis muscles are made up of several fibers that attach to the ribs and vertebrae. They work together to promote movement of the rib cage. One of the main factors that affects the functioning of the interspinous thoracic muscles is thoracic breathing. Deep breathing allows muscles to work