What is the Forearm

What is the Forearm

The lower forearm is one of the four sections in which the upper or thoracic appendix is ​​separated, being the third of them. The lower arm is restrained by its upper face with the arm through the elbow and by its lower face with the hand through the wrist joint.

The skeleton of the lower arm is made up of two long bones: the rank (external bone) and the ulna (internal bone).


The radio explains with the arm bone, the humerus, with the ulna itself (ulna) and with the scaphoid and lunar carpal bones. The ulna (once called Nachi) is verbalized with the arm bone, number, and radio.


It is framed by the radicubital (radioulnar) joint that is part of the association, by the incomparable and sub-par zone, of the ulna and the sweep. Between them is an extremely secure fibro-ligament space (synchondrosis). This joint is what allows for pronation and supination developments, where the range revolves around the ulna.

Cracks in the lower arm

The lower arm district is one of the most affected, being the wrist where most of an individual's complete rests occur, paying little attention to their age.

Muscles


The lower arm muscle district is made up of twenty muscles and is isolated in three muscle areas:

frontal district, postero-external area, posterior local.

Forearm frontal district

It contains four muscle planes with eight muscles, which are, from the most superficial to the deepest:

Front area:

Later medially, we find:
round pronator, greater palmar or spiral flexor of the lesser carpopal, or frontal palmar ulnar or ulnar flexor of the carpus

Foundation:
The superficial flexor of the fingers, containing four fascicles, is discovered.

Third plane:

deep flexor of the fingers, composed of four fasicles; long flexor of the thumb.

Fourth plane:
square pronator
Posteroexternal area of ​​the lower arm.
It contains four muscles that are, from the most superficial to the deepest:

long supinator or brachioradialexus carpi radialis longus, short extensor of the carpal spiral, short supinator or supinator.

Posterior area of ​​the lower arm.

It contains two muscle planes with a sum of eight muscles.

Superficial plane Contains four muscles. Later portrayed medially, we find:

Anconeus (explicitly discovered in 3 individuals out of 10) extensor digitorum regular, divided into three fascicles; it has an extensor of the little finger; posterior ulnar

Deep Plane Contains five muscles. Represented in the lateomedial and anteroposterior sense, we find:
Short thumb extensor, long thumb abductor, long thumb extensor, legitimate list extensor.

At the top of the forearm is the small anconeus muscle.