chest muscles are an important component of the musculoskeletal system.They begin at the front surface of the chest, then go to the belt of the upper limbs.In addition, isolated autochthonous (own) muscles, which are fixed to the ribs.Accordingly, its anatomical location, they carry out the movement of the upper limbs, as well as participate in the process of inhalation.
Accordingly, classification, release muscles that are relevant to the upper limbs and chest muscles on site.This division corresponds to the functions they perform, rather than anatomy.
The first group includes a large, jagged and pectoralis minor.The first starts from the front surface of the clavicle (its medial side), cartilage second to the seventh rib and ends in the front wall of the rectus abdominis muscle tendon.On top of the muscle attaches to the greater tubercle of the humerus.It performs the following functions: to bring the upper limbs to the body, they turn inward, the fibers, which is adjacent to the clavicle, is involved in the bending arm.Also, it is involved in the process of inhalation.To this end, the upper limbs should be given to the body, are fixed.She also participates in brachiation (tightening).
Small pectoral muscle located under the large.It originates from the second and continues until the fifth rib, is attached to the process of the scapula.Muscle performs the following functions: while reducing delays lopatkuv forward and downward.When fixing hand it is involved in the process of respiration.
subclavian pectoral muscle located between the collarbone and the first edges.It performs the following functions: fixation of sternoclavicular connection, pulling medially collarbone and down.
serratus anterior is projected onto the side of the chest.It comes from the upper nine ribs, is then attached to the inner edge of the blade.However, it is attached to the edge of the rhomboid muscle, which causes the similarity of their functions.These include fixation of the blade, turn the lower portion of this bone laterally and in front of that observed when raising the arm above the horizontal line.
external and internal intercostal muscle of the chest muscles are their own art.They are fixed to the rib cartilage.Unlike external and internal muscle lies in their fibers.For the first characteristic direction back and forth from the top down.Internal intercostal muscles have the opposite course of its fibers that reach the sternum.However, they perform the same function.
Podrёbernye muscles are also at their own muscles.They are located on the inner side of the breast in its lower part.Podrёbernye muscles are attached to the corners of the edges.The peculiarity of the course of their fibers is throwing two ribs.
lower pectoral muscle (transverse) is located on the inner surface, and also belongs to the group's own muscles.It has a vertical movement of the fibers.This distinguishes it from all the entities of the group.All
own chest muscles involved in breathing.It is their main function.Muscle up all the edges and the chest expands in all directions.As a result of carried out a breath.Exhale occurs passively, this contributes to the elasticity of the chest, lungs.There is a theory according to which the internal intercostal muscles take in the implementation of tidal.However, of all formations of this type the greatest contribution to the act of breathing makes the diaphragm.
Any pectoral muscle is a vital form, since, in addition to motor function, respiratory function it performs.
