What condition is characterized by the demyelination of peripheral nerves?

• A. Multiple Sclerosis
• B. Guillain-Barré Syndrome
• C. Myasthenia Gravis
• D. Neuropathy

Answer: (B)

Guillain-Barré Syndrome is a condition characterized by the demyelination of peripheral nerves. This autoimmune disorder occurs when the immune system mistakenly attacks the myelin sheath, which is the protective covering of nerve fibers in the peripheral nervous system. As a result, patients often experience muscle weakness, sensory disturbances, and in severe cases, paralysis.

The hallmark feature of Guillain-Barré Syndrome is its rapid onset, usually following an infection, and the pattern of progressive motor weakness that typically ascends from the legs to the upper body. The demyelination impairs the conduction of nerve impulses, which can lead to significant clinical symptoms including loss of reflexes and muscle control. This distinguishes it from conditions such as Multiple Sclerosis, which primarily affects the central nervous system, and other options listed, making Guillain-Barré Syndrome the correct answer regarding peripheral nerve demyelination.