Nerve Shoulder Cutaneous Medial

Cutaneous medial brachial nerve: anatomy and functions

The brachial nerve is cutaneous medial, also known as n. cutaneus brachii medialis, PNA (from the Latin nervus), or BNA (from the English branch), is one of the important nerves innervating the skin of the shoulder. In this article, we will review the anatomy and function of the brachial cutaneous medial nerve, as well as its role in the normal functioning of the upper extremity.

Anatomy:
The brachial nerve of the cutaneous medial originates from the brachial plexus, which consists of a plexus of nerves formed by segments of the cervical and upper thoracic spinal cord. It is formed by the connection of fibers that pass through the superior medial angle of the scapula and run down the anterior surface of the shoulder. The cutaneous medial brachial nerve innervates the skin on the medial (inner) side of the shoulder.

Functions:
The cutaneous medial brachial nerve is a sensory nerve and is responsible for innervation of the skin on the medial side of the shoulder. It provides skin sensitivity and transmits tactile, pain and temperature signals to the central nervous system. Thanks to the brachial cutaneous nerve, we can feel touch, pressure, pain and other sensory stimuli on the medial side of the shoulder.

Clinical significance:
Damage to the medial cutaneous brachial nerve can lead to disruption of the sensory innervation of the medial side of the shoulder. This may occur as a result of injury, nerve compression, or other pathological conditions. Symptoms of injury may include numbness, tingling, hypersensitivity, or loss of sensation on the medial side of the shoulder. To diagnose and treat such conditions, it is recommended to consult a doctor who specializes in nervous disorders.

In conclusion, the cutaneous medial brachial nerve plays an important role in the sensory innervation of the medial aspect of the shoulder. It provides sensitivity and transmission of sensory signals to the central nervous system. Damage to this nerve can result in sensory impairment in the shoulder. If such symptoms occur, it is recommended to consult a medical specialist for diagnosis and treatment.

The cutaneous medial brachial nerve is a branch of the brachial plexus that passes through the medial part of the humerus and innervates the skin on the anterior surface of the shoulder.

This nerve is one of the largest nerves in the brachial plexus and is important for transmitting nerve impulses from the skin on the shoulder to the central nervous system. It also supplies innervation to the muscles that are involved in shoulder movements, such as raising and lowering the arm and rotating the shoulder.

The cutaneous medial brachial nerve passes through the medial border of the shoulder joint and passes through the medial foramen of the humerus before entering the brachial canal. In the canal, the nerve passes alongside the brachial nerve and other structures such as brachial vessels and muscles before exiting the canal through the medial foramen of the shoulder.

Innervation of the skin on the anterior surface of the shoulder is carried out through small branches of the cutaneous medial brachial nerve, which pass through the skin and transmit impulses to the nerve endings. These impulses are then transmitted to the central nervous system and processed by the brain, allowing us to feel heat, cold, pressure and pain on the skin of the shoulder.

In addition, the cutaneous medial brachial nerve also innervates muscles that are involved in rotational movements of the shoulder. For example, it provides innervation to the biceps brachii muscle, which is responsible for rotating the arm in the shoulder joint.

Damage to the cutaneous medial brachial nerve can lead to disruption of the innervation of the skin on the front of the shoulder and the muscles involved in rotational movements. This may manifest itself as numbness, pain or loss of sensation in the skin and muscles of the shoulder, as well as an impairment in the ability to control these muscles.

Treatment for brachiocutaneous nerve injury involves repairing damaged tissue and restoring nerve fibers. In some cases, surgery may be required to repair the nerve or connect it to other nerve fibers.