Anatomy of the elbow joint, structure, functions


2018-03-18 14:31:09




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The human Body is a coordinated system. With the right device, its parts, performs all the functions necessary for life. The main pillar of the body is the skeleton. The following are considered the most important component of joints and ligaments. Because of these formations people are able to make any movement.

The Joints of the upper extremity are numerous. Most of them observed in the hands and fingers. However, in order to bring the entire upper limb in motion, takes the three main joints: shoulder, elbow and wrist. The anatomy of these complex entities because they are composed of many parts (bones, ligaments, muscles, nerves and vessels).

anatomy elbow joint

What is the elbow joint?

Anatomy of the elbow joint, shoulder joint, like the wrist, is a coordinated mechanism that has multiple components. Each of these entities is important. Only through proper structure of the entire joint, it can carry out its functions. Anomalies or diseases of the bone or ligaments leading to movement disorders of the upper limb. The same applies to abnormalities of the blood vessels and nerves.

Anatomy of the elbow joint includes 3 bones, several ligaments, capsule and muscles. For the functioning of each of these entities should blood supply and innervation. Like any part of the body, has blood vessels and nerves and the elbow joint.

Anatomy it created so all components together performed a single function-movement of the limb. In General, the term “elbow” includes not only the joint but also the forearm. Thanks to the coordinated work of these entities, he can perform the following functions:


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  1. Flexing the upper limb.
  2. Pronation and supination.
  3. Extension of the hand.
  4. From - and a cast of the forearm.

Bones and joints of the elbow

Anatomy of the elbow difficult, as it is of complex joints. Primarily this is because it is composed of 3 bones. In addition, each of them connected by small joints. They are all under a special capsule – bag.

Clearly consider the education to be in a special Atlas. There you can see all the joints that comprise the elbow joint. Anatomy (photo in Atlas, to help you better understand it) this formation is represented there in various angles and sections that it is clear to all his device.

anatomy of the elbow joint lymph flow

Bone, a part of the described joint and located at the top (proximal) called the humerus. It starts from the scapular depression and ending at the elbow. Refers to the tubular bones of the skeleton. When viewed in cross-section, we can see that the lower part has the shape of a triangle. This area includes the articular surface. Its middle part is connected with the ulna and forms a small joint. It is called – preselective articulation.

The Side (lateral) is the connection with the radial bone. There is also a joint called the brachioradialis joint. Two dice included in the elbow joint with the distal part, also connected with each other. They form the third articulation – proximal radioulnar. All together these reasons education is covered by the bag.

anatomy of the elbow venous outflow

What are the ligaments formed by the elbow?

In Addition to bones, anatomy of the elbow joint includes the ligaments. They are the connective tissue fibers, which are also required to implement the motion. Here are the following bundles:

  1. Radial collateral. It starts from the protruding part (condyle) of the ulna, which is located on the side. Further, the bundle descends below and encircles the radial head bone. Then attaches it to the tenderloin on it.
  2. The Ulnar collateral. As the first, originates from the condyle of the humerus (internal). After that it goes down. This ends in formation of the trochlear notch.
  3. Annular ligament of the radius. It is located between the front and rear portion of the tenderloin. The fibres of this ligament covers the radial bone, thereby attaching it to an elbow.
  4. Square. Facilitates the connection of the neck of the radial bone with the cutting of the elbow.
  5. Interosseous membrane of the forearm. Is a dense connective tissue, which is necessary for fixation. Occupies the entire space between the ulna and radius bone.

Muscles, are part of the elbow joint

Muscles – the organs by which man can perform the stretching and bending of limbs. Anatomy of the elbow joint includes the striated muscles, although the muscles are not part of the joint. Nevertheless, they are indispensable, as without them, the joint cannot carry out its function. Muscles located in the proximal and distal region, i.e. above and below the joint. Among them:

  1. Shoulder. It is situated a little above the joint. Thanks to her, are flexion movement of the forearm.
  2. Two-Headed muscle (biceps). Starts in the upper part of the humerus, well detectable when the voltage of the hands. Belongs to the group of flexors.
  3. Triceps. Responsible for the movement of the forearm.
  4. Ulnar muscle. Necessary for the extension of the joint.
  5. The Ulnar flexor of the wrist.
  6. Round pronator. Involved in the flexion of the forearm.
  7. Long Palmar muscle. In some people, it is not. This muscle is required for extension of the forearm and the palm.
  8. Superficial flexor of the fingers.
  9. The Brachioradialis muscle. Responsible for turning and flexing.
  10. Muscle arch support. It is located in the bone area of the forearm.
  11. Long and short radial extensor.

Thanks to all of them the upper limb performs movements. Therefore, they should also be attributed to the anatomical structures of the elbow. Because the muscles involved in the movement of the forearm.

elbow anatomy

What are the bags of the elbow joint: anatomy

All anatomical structures of the elbow joint are enclosed in a so-called bag. It consists of a synovial membrane, which is located inside liquid. In the cavity of the bag includes all 3 joints of the bones. As a result, the formation of a joint-the elbow.

In turn, each of the three small joints is also enclosed in the bag. By the way, this sheath is present in all joints of our body. It protects bones and ligaments from damage. And the liquid, which is inside the bag, which is required for lubrication of the articular surfaces. Thanks to synovial fluid, the bones and joints are not damaged in the collision (during the movement).

What arteries supply blood to the elbow

To all entities included in the elbow functioned needed blood flow. It comes with three large vessels. Among them are: humerus, ulna and radius of the artery. Each of them in turn, has ramifications. In General, the elbow 8 is supplied by arteries branching from the main three. Some of them provides oxygen to muscles. Supply blood to other bones and joints.

All of these vessels form a network-to-end anastomosis. As a result of the defeat of one of them, the blood still goes to the body. However, the anastomoses between the arteries do not always help the wounded. This is because bleeding from the network of blood vessels difficult to stop.

All the arteries located on the surface of bag replacement. Thanks to them, all the joints is fed with oxygen. anatomy of the elbow joint shoulder joint

Vein elbow joint

Venous system spread throughout the body. Is no exception and the anatomy of the elbow joint. Venous outflow from the entities that compose the articulation, is the eponymous (arteries) vessels. That is the blood rich in carbon dioxide, from the joint returns to a cardiac system. There are the following vessels, engaged in the outflow:

  • The lower and upper ulnar collateral - they are branches from the brachial veins;
  • Return the elbow - it has 2 branch (front and back). Both of them are part of the cubital vein;
  • Interosseous recurrent;
  • The return radiation in the blood supply to the involved elbow 1 branch of it;
  • The median and radial collateral.

These vessels carried the blood into pools three main veins. They are called the same way as the arteries: radial, ulnar and shoulder. All of them fall into the large axillary vein.

elbow joint anatomy photos

Anatomy of the elbow joint: lymphatic (vessels and nodes)

The Lymphatic system consists of vessels and ducts. Also in the body there are several major groups of peripheral nodes. Among them: axillary, elbow, inguinal, and other clusters of lymphoid tissue. In addition, there are small nodes.

The lymph drainage is through deep vessels. They are next to the arteries and veins of the upper limb. Lymphatic vessels of the hands...

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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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