How does demyelination affect nerve conduction in multiple sclerosis according to the chapter?

Demyelination in multiple sclerosis disrupts the conduction of nerve impulses along affected nerve fibers, leading to a loss of function in those areas. This occurs due to the breakdown of the myelin sheath that normally insulates the nerves, preventing normal transmission of signals.

In multiple sclerosis, the demyelination process affects the white matter of the brain and spinal cord, resulting in impaired conduction of nerve impulses. The loss of myelin sheath around the axons disables the normal transmission of signals, leading to various neurological deficits. As the disease progresses, areas of inflammation and demyelination can form plaques, further contributing to the loss of nerve function.