shoulder belt is composed of three bones: the clavicle, scapula, humerus (upper arm bone), as well as muscles, ligaments and tendons.Shoulder joints are movable joints between the bones of the shoulder.Muscles and shoulder joints allow it to move in a predetermined range of motion.The muscles of the shoulder and shoulder girdle are responsible for the movement of the scapula, humerus, and clavicle.In addition, these muscles, make out the shoulder, the shoulder joint and armpits (axilla).For example, the rounded contour of the shoulder joint is formed by the deltoid muscle.Anatomically, it is a set of different fibers, whose work is coordinated by the central nervous system.
Human shoulder - this upper arm with the muscles and bones, concluded between the shoulder and elbow joints.The upper limit of the shoulder - a transverse line of the lower edge of the pectoralis major, teres major muscle and broad back muscles.The bottom border is higher (by 2 cross fingers) condyle of the humerus.Shoulder muscles are located at the front and rear surfaces of the humerus.The front group of muscles called the biceps (in Latin - musculus biceps brachii) or biceps.Posterior group muscles - triceps (in Latin - musculus triceps brachii) and triceps.
resilient and elastic tissue (skeletal, or it is also called striated), which consist of the shoulder muscles, can shrink due to nerve impulses.Because of these properties of muscle tissue is a movement of the elbow and the triceps and biceps are responsible for these movements.In addition, both of these muscles determine the shape of the shoulder, which depends on the degree of fatness and muscle.Due to the subcutaneous fat in children and women are smoothed reliefs muscles and shoulder looks close to the correct cylinder.In men with muscular shoulder greater volume in the upper part than in the area bordering the elbow.
vernacular name of the biceps - biceps - is derived from two Latin words: bis, which translates as a double, and caput, meaning head in translation.Biceps (two bundles of muscles) has two heads, connecting the middle of the shoulder to the common muscle belly.The long head is attached to the shoulder blade (epiarticular roughness troughs) initial tendon.Short head and begins from the blade (coracoid process).Biceps is attached to the upper end of the forearm tendon, into which the total abdomen.The main function of this muscle is flexion of the elbow joint hands.It is innervated by the musculocutaneous nerve.
vernacular name of the triceps muscle - triceps - also comes from two Latin words, the first of them (tri) is three, and the second (caput), as has been described above.This large muscle is approximately 2/3 of the muscle responsible for arm and extension (straightening) arm at the elbow, also captures the elbow, forearm and wrist when used for fine movements, such as writing.It consists of three bundles of muscle tissue that start with three heads (long, medial and lateral), and converge and come together in one tendon of the elbow.Classically, it is believed that all three heads of the triceps muscle innervated by the radial nerve.However, there are the results of studies showing that may occur innervation branch of axillary nerve.
human forearm is the part of the hand, which is between the wrist and the elbow joint (otherwise known as the wrist).The forearm consists of two bones and muscles (ulnar and radial).Muscle tissue is formed from four layers of muscles, which belong to the front panel and two layers of posterior muscle group.The result of their work is hands movement (including the phalanges), and wrist.In general, the muscles of the shoulder and forearm provide a wide variety of movements of the shoulder, forearms and hands.
