Upper limb prosthesis

Prosthesis of upper limb or upper limbs. The upper limb or upper extremity, in the human body, is each of the limbs that attach to the upper part of the trunk. It consists of four segments: scapular waist, arm, forearm and hand and is characterized by its mobility and ability to manipulate and hold.

In formal terms, "arm" only refers to the second segment of the upper limb, and should not be understood-at least in anatomical language-as the entire limb.

Scapular waist
It is composed of the bones of the clavicle and the scapula, two on each side, which fix the upper limbs to the upper part of the trunk (thorax) at shoulder level.

Arm
Its skeleton is formed by a single bone, the humerus, the longest and voluminous bone of the upper limb. The arm is formed on its anterior side by flexor muscles (brachial, coracobrachial and anterior brachial biceps), which will be innervated by the musculocutaneous nerve. While in its posterior face will be the extensor muscle (Triceps brachial), which is innervated by the radial nerve. There are different models of prosthesis for arms for amputees

Forearm
It is formed by the ulna and radius. It articulates in its proximal portion with the scapula and in its distal portion with the ulna (ulna) and the radius. In his previous portion he wasThe flexor muscles will enter, while the extensors will be in the posterior portion. In total, the forearm region has 20 muscles, of which only 17 cross the elbow joint. Arm prosthesis

Hand
The hand is attached to the forearm by a union called the wrist (whose bones form the carpus) and consists of a central palm (whose bones form the metacarpal) from which five fingers (also called phalanges) arise. In addition, the hand is composed of several different muscles and ligaments that allow a large amount of movement and dexterity. Prosthesis for hands

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