Nerve of the Shoulder Cutaneous Lateral Superior

Cutaneous lateral superior brachial nerve: anatomy and functions

The cutaneous branch of the superior lateral brachial nerve (PNA) is an important nerve that supplies the skin of the upper arm. It is one of the branches of the lateral cutaneous brachial nerve, which in turn is a branch of the radial nerve.

Anatomy and trajectory of a nerve

The brachial nerve cutaneous lateral superior begins at the shoulder joint, where it arises from the brachial nerve cutaneous lateral. It then runs down the side of the shoulder as it approaches the elbow joint. Finally, it ends at the cubital fossa.

Functions

The cutaneous lateral superior brachial nerve does not provide motor innervation to the shoulder muscles. It is responsible only for innervation of the skin of the upper shoulder. Specifically, it supplies the skin on the lateral side of the shoulder, from the shoulder joint to the cubital fossa. This sensitivity allows a person to feel various stimuli, such as touch, pressure and pain, in this area.

Pathologies

Damage to the lateral superior brachial nerve is rarely encountered as a separate pathology. However, like any other nerve, it can be damaged by injury or surgery. Disruption of innervation can lead to loss of sensation in the area innervated by this nerve. In such cases, medical intervention may be required to restore normal nerve function.

In conclusion, the cutaneous lateral superior brachial nerve is an important nerve that provides sensation to the skin of the upper arm. Although damage to this nerve is not a common problem, damage to it can lead to loss of sensation in this area. It is important to know the anatomy and function of this nerve to understand its role in normal shoulder function and the potential problems associated with injury.

The cutaneous lateral superior brachial nerve (eng. C5 nerve) is one of the cutaneous nerves of the arm in the upper limb of a person, formed by the branching of a branch of the brachiocephalic trunk and participating in the innervation of the skin of the shoulder and forearm. The nerves of the arm are the smallest of the major cranial nerves.

The nerve's key function is to control the movement of muscles in the arm, usually including the shoulder, arms, and hips. The nerve is also involved in maintaining normal blood flow in the arm and determining pain levels.

If the nerve is damaged, problems with sensation, motor skills, and balance in the hand may occur. In some cases, if the damage is severe, the nerve may stop functioning and this can lead to paralysis of the affected arm, especially the hand. If the nerve function is severely impaired, the patient may experience weakness in the arm. Patients with these symptoms should see a doctor immediately to evaluate the extent of nerve damage. The doctor can diagnose and prescribe appropriate treatment.