What is the forearm of the pronation?
The forearm pronation is caused by the rotation of the forearm inwards so that the palm of the hand is facing back or in the same direction as the elbow. Although it may seem like a wrist action, the hand can not actually rotate on the wrist independently of the forearm. Instead, the forearms are formed when two parallel bones of the forearm, ulna and radius, rotate around them, form X. This movement occurs through several muscles in the forearm, including the Quadratus, stiffer flexor and flexor Carpi radialis. They lie parallel among themselves, but in opposite positions, like two people lying in bed, but with the head of one person at the foot of the bed and legs on the pillow. The radius lies on the arm of the arm and articulates with the carpal bones at the base of the hand to create most of the surface surface of the wrist and with the humerus bone at the top of the ARM to create a small part of the elbow joint. Together with the radius is the ulna, which is located on the side of the arm with the fingers of the arm and articulates with the humerus to create most of the surface surface of the elbow and withKarpus to form a small part of the wrist.
just below the elbow joint, the head of the bone with a radius, which is much narrower than the end of the ulna next to it, fills the cavity in the uln called a radial notch. The cylinder is the radial head held in place against the radial notch of a top ligament called an ring ligament and can turn one direction in this warranty. The joint created by these bones is known as the proximal Radioul's joint.
Similarly, in the place where the head of the ulna encounters the end of the radius above the wrist, is an almost identical joint called the distal radioulnar joint. Here Ulnar's head Hodído depression on a radius called Ulnar Notch. As with the proximal joint, the ulna turns in this notch to create the movement of the forearm.
During the forearm pronation, the radius bone is pulled over the front of the ulna bone until both bones create an elongated x and the palm pointing back when the armE hangs on the side or down when the elbow bends to 90 degrees. The muscles that produce this effect are the Ters of the pronator in the upper forearm and the pronator quadratus in the lower forearm, the muscles that pass the front or front of the forearm diagonally. When they retreat, they turn the radius medially or towards the body when the arms hang on the side. The muscle that helps with the forearms of the pronation is Flexor Carpi Radialis, the wrist flexor.