The sternum-cloth joint-where is the structure, muscles, shape, movement, ligaments, anatomy, classification features, function

This article describes the anatomical structure of the sternum-circuit joint.

Content

Sternum-cloth joint- articulatio sternoclavicularis — a person needs to be freely moved with his hands. This node has increased strength, it is light and flexible. All you need to know about the structure and functions of this joint will be found in this article.

Breast-skid joint-where is: anatomy, shape, structure

The sternum-cloth joint You can see a naked look, but only if the weight of a person is lower than the norm. If there is little fat layer and muscles, this node appears well through the skin. If the weight is normal or higher than the norm, then this knot does not appear through a layer of fat, muscles and skin. This joint attaches the collarbone to the sternum.

Below in the figure you can see the structure of this joint with ligaments, disk, a sternum handle and other parts of this node:

Such a knot outwardly in shape resembles a saddle, and its asymmetry helps to firmly connect the bones different in size. A special bone-cheerful disk that is located inside the joint is an additional shock-absorbing limiter connecting the bone heads. The joint is covered with cartilage, which perfectly protects it from different influences from the outside.

Sternum-cloth joint: movements, functions

As a result of evolution, a person began to walk directly, so this knot is now less functional than that of animals. But his purpose remained the same as many centuries ago: to help move his hands freely. At the same time, involvement and loads have become much less.

Such a articular ligament and the muscles that surround it allow a person to make free fly movements with his hands. There are 3 axes on which a person performs his hands using, using articulatio-sternoclavicularis:

Frontal - rotation in the shoulders.
Vertical - Breeding and reducing the shoulders and blades occurs.
Sagittal - Raising and lowering the hands.

Such a node connects the main skeletal bones to the upper limbs. The possibility of raising and lowering the hands, information of the blades, and the performance of complex movements with the hands depends on his health. All this also depends on the muscle tissue that surrounds the joint. The good elasticity of the muscle canvas helps a person’s torso be flexible.

Sternum-cloth joint-muscles, ligaments

The muscles of the sternum-circuit joint

Around the knot articulatio-sternoclavicularis There are a muscle canvas and a dense capsule. It is covered with such binding beams from above:

Front and rear sternum -Strengthens the capsule on the 3rd surfaces: front, upper, rear. Such a knitting is wide, but not long. It can be intertwined with the connecting binding stripes of microcapsules.
Rib-key a binder bundle - It originates from the top of the first label. It is attached to the collarbone. It has a good fortress, very dense and wide. Serves as a brake with an increased amplitude of movements in the node upward, and is a stabilizer of the hand belt.
Interplitable bundle - It is located between the two ends of the collarbone. It is stretched like a string above the jugular dimple of the sternum. It acts as a limiter for the motor functionality of the clavicle in the lower plane.

The muscles consist of multiple layers of connective tissue. In this case, individual muscle bundles are located at an angle. This helps to make the muscle multi -powerful and increase its lifting force. The muscles in front of the joint not only help the hands go up, but also penetrate them. The posterior muscles not only perform the function of extension, but also act as supporters-limiters.

Thanks to dense ligaments and features of the structure of the node, a person can make up to 100 or more movements of the limbs per day. On the one hand, the node has good stability, and on the other, it performs rotations in various planes. The strength of the node, connecting strips and elasticity of muscle tissue allows a person to withstand a powerful functional load.

Sternum-cloth joint-Features of the classification

Features of the classification of the sternum-circuit joint

Specialists of anatomy are still debating about the classification of this articular nodule. Some are sure that this narrow cartilage is flat, others argue that it has the shape of a ball, and others attribute to it the definition of a saddle joint.

But, if you delve into anatomical terms and decryptions, you can understand the following:

Flat joint It does not have such a large amplitude of movements as the sternum-key joint.
In the description of spherical joints A very high amplitude is mentioned, not at all the same as that of this node.
Therefore, it is customary to attribute this joint to the saddle description, and in structure it is simple or complex.

Here is a description of the classifications that belong to articulatio-sternoclavicularis:

Simple - formed using one or two nodal surfaces.
Complex - It is supplemented inside the joint capsule with special cartilage, which provide congruence. In this joint, a cartilage disk is such an additional component.
Saddle Joint node-consists of 2 articular surfaces that are located above the other. One bone moves along the other, which ensures an excellent sliding necessary for performing movements with the hands.

Articulatio-sternoclavicularis - This is one of the most mobile nodes in our body. External impact on this node can lead to injury. If you do not treat such or other injuries in a timely manner, then arthrosis or arthritis may develop in the end. What else can these diseases arise from and how to deal with them, read the article on this link. Take care of your joints and be healthy!