What is the circuit?

The district is a type of common action that produces a circular or more precisely conical movement of the limb extending from this joint. An example of the circuit is the ringing of the arm on the shoulder joint. Although several condyloid joints, including elliptical joints such as wrist joints and fingers base, are described as a capable circuit, in fact they can only produce a diamond -shaped movement consisting of flexion and extension, kidnapping and adction. These are movements at the back, rear and side to side. Only joints with balls-of-sakes that are found on the hips and shoulders-they are truly able to encircle or 360 degrees of movement. On the upper part of the bone in the attached limb there is a head, a ball -shaped structure that puts it into a round cavity or drawer on the receiving fraction. In the hip joint, called acetabulofemoral joint, the head of the femur or thigh bone is inserted into the pelvic bone called acetabul. In fact, this cavity consists of three neighboring bones: ischium, Ilium and pubis.

Because the hip circulation is the result of a combination of movements, several muscle groups are needed to twist the foot. It brings a leg forward or flexion and uses the muscles of the hip of flexor muscles - among them the muscles of Iliopsoas, rectus femoris quadrilateral muscle and tensor fascia Latae (TFL) upper thigh. About the kidnapping of the foot or it lifts it to the outside and hires hip kidnapping, including TFL, as well as gluteus medius and minimus on the side of the hip. Extension of the foot or brings it to the body, activates gluteus maximus, hamstrings and muscles adductor magnus. Finally, adduction the leg, or bring it in, requires hip aductors: Aductor Brevis, Aductor Longus, Aductor Magnus, Pectineus and Gracilis, which are located on the inner thigh.

in the shoulder joint, glenohumeral joint, a ball of the humerus bone in the upper part of the arm inserts into the cavity in the shoulder known as glonoid fossa. Of any joint inThe body is a glenohumeral joint capable of the largest range of movement. Like the hip joint, many muscle groups are necessary to allow caution. The shoulder flexion is achieved through the pectoral muscles in the chest and the leading deltoide in the shoulder, while the extension requires both the rear deltoid and the latissimus dorsi and Teres Major. The kidnapping is the result of closing the infection of supraspinatus, muscle of the rotator cuff and deltooid; Adduction, on the other hand, is achieved by pectorals, latissimus dorsi and Teres Major, among other things.