The hand is the most moving part of the hand, which opens up a huge field for activity for a person. With the help of brushes, we can perform both rough work, requiring the application of force, and thin, high-precision, with the smallest fragile details. And first of all, the bones of the wrist are responsible for this.
Hand - what is this organ?
Answer: tactile. A lot of sensitive cells and muscles make it possible to recognize the type of object by touch and determine its characteristics, make various movements related to the supporting ones, as well as such movements as lifting, turning and lowering.
Anatomy: bones of the wrist
The bones of the hand are divided into five groups, which can be clearly seen in the figure.
At the very base of the brush is a group of eight bones that form its skeleton (Carpals). This includes the following bones:
- capitate;
- trapezoidal;
- trihedral;
- scaphoid;
- hooked;
- lunar moon;
- pea-shaped;
- bone trapezoid.
Of the above four (3rd, 4th, 6th and 7th) represent the proximal row. They are adjacent to the bones of the forearm. The remaining four, except for the pisiform bone, make up the distal row, which faces the metacarpus. Interosseous ligaments firmly unite the bones of the wrist. Their anatomy is such that, due to such a connection, they fit snugly against each other and, in fact, form a single surface.
Next, the bones of the wrist turn into spotted (Metacarpals). This is the bridge between the base of the brush and its phalanges. They are curved to the back of the palm, have a tubular structure. Traditionally, they are divided into three sections: the base, body and head.
The following three groups are the bones that together form the fingers: these are the proximal, middle and distal phalanges.
Functions that Perform Wrist Bones
The bones of the wrist, presented in the form of small formations, allow you to manipulate the angle of the bend of the palm relative to the forearm. With a brush, we can grab and let go of objects, zoom in and move them away from the body. Having bent the brush at an angle of ninety degrees, you can use it as a support when standing on your hands, which is common in sports or dancing. All these manipulations occur extremely quickly and in a coordinated manner, and the entire system, which consists of the bones of the wrist and hand, is light and simple.
Pain in the hand
Many people experience pain in the upper arms. It happens that the "bones of the wrist" whine. Anatomy makes it clear that the human hands are constantly in working mode, and therefore are experiencing heavy loads. Of course, this directly depends on the type of activity: the heavyweight athlete loads his hands harder than the secretary, but the professional athlete’s hands can withstand more than the hands of a beginner. In this case, the same load for the first will be permissible, and for the second it can lead to injuries or pain. It is not easy to immediately diagnose exactly which disease caused the wrist bones to hurt. The cause may be a
dislocation, sprain , even a fracture or a crack in the bone part. Also, such pains can be a "bell", indicating gout, arthritis or osteoarthritis. If you notice pain of this kind, you should seek the help of an orthopedist and / or neurologist, before thoroughly considering what kind of stress you were subjected to before discomfort appeared. Perhaps you decided to make a rearrangement in the house and, not sparing yourself, moved the sofa, wardrobe, chest of drawers, etc.? Or maybe you are constantly working at a computer and your mouse is not very convenient. There may be plenty of options.
How without them?
Human brushes - this is the organ without which it becomes difficult to eat, manage physiological needs, work (in almost any field), etc. People who, for various reasons, were left without this body, learn to live anew. Many find application to the toes, even paint pictures, to say nothing of bringing a spoon to his mouth.
But this is much harder than using brushes that, under the strict guidance of the brain, are capable of doing incredible things. But people live, and sometimes more fully than others, and find in this life a lot of joy that the healthy are incapable of. And it is worth learning from and appreciating from them what Mother Nature has bestowed upon us from birth.