Cubitus
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| Latin | Cubitus |
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| TA2 | |
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The term cubitus refers to the forearm or the elbow region in human anatomy. It is a part of the upper limb between the humerus and the carpus (wrist). The cubitus is composed of two long bones, the radius and the ulna, which are connected by an interosseous membrane.
Anatomy of the Cubitus[edit | edit source]
The cubitus is a complex structure that includes several important anatomical features:
- Bones: The radius and ulna are the two bones that form the cubitus. The ulna is located on the medial side (the side closest to the body) and is longer than the radius. The radius is located on the lateral side (the side away from the body).
- Joints: The cubitus includes the elbow joint, which is a hinge joint formed by the articulation of the humerus with the ulna and radius. The proximal and distal radioulnar joints allow for the rotation of the forearm.
- Muscles: Several muscles are involved in the movement of the cubitus, including the biceps brachii, triceps brachii, brachialis, and brachioradialis. These muscles are responsible for flexion, extension, and rotation of the forearm.
- Nerves: The cubital region is innervated by the median nerve, ulnar nerve, and radial nerve. These nerves are responsible for the sensory and motor functions of the forearm and hand.
- Blood Supply: The blood supply to the cubitus is provided by the brachial artery, which divides into the radial artery and ulnar artery in the forearm.
Clinical Significance[edit | edit source]
The cubitus is a common site for injuries and medical conditions, including:
- Cubital tunnel syndrome: A condition caused by compression of the ulnar nerve at the elbow, leading to pain and numbness in the forearm and hand.
- Fractures: The radius and ulna are susceptible to fractures, especially in cases of trauma or falls.
- Tennis elbow: A condition characterized by pain and inflammation of the tendons on the lateral side of the elbow, often due to overuse.
- Golfer's elbow: Similar to tennis elbow, but affects the medial side of the elbow.
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