Variant structures potent to compress the median nerve in the arm (original) (raw)

AI-generated Abstract

The most commonly known nerve compression syndrome is carpal tunnel syndrome, in which the median nerve is compressed at the wrist. Along with the pathological processes, some of the anatomically variant structures can also compress the nerves and often leads to confusion in the diagnosis and treatment if one is unaware of such possible anatomical variants. Here, we present a case of possible median nerve compression by an additional belly of coracobrachialis and a fascial sheet from the brachialis, and we also discuss the other possible structures that can compress the median nerve. N erve compression syndromes involving peripheral nerve dysfunction that may be due to structural changes in the nerve or adjacent tissues such as anatomical variations are common. A well-known example is compression of the median nerve at the wrist (carpal tunnel syndrome), other nerves, such as the ulnar nerve at the wrist or the elbow, radial nerve in the radial groove, and the spinal nerve roots at the vertebral foramen are vulnerable. Nerve compression syndromes usually occur at sites where the nerve passes through a tight tunnel formed by stiff tissue boundaries. The resultant confined space limits movement of tissue and can lead to sustained tissue pressure gradients. Space-occupying structures or lesions (for example, lumbrical muscles, tumors, and cysts) can cause nerve compression injury.

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