Dementia related disorders characterized as disabling disease of the brain and the spinal cord (central nervous system)

A. Multiple sclerosis (MS) is a disabling disease of the central nervous system (brain and spinal cord). It involves the immune system attacking the protective myelin sheath covering nerve fibers, causing communication problems between the brain and the rest of the body. This progressive damage can lead to both physical and cognitive disabilities, making it a dementia-related disorder in some advanced cases. B. Huntington chorea (Huntington’s disease) is a genetic neurodegenerative disorder that affects movement and cognitive function, but it is not primarily defined as a disorder of both the brain and spinal cord. C. Wernicke-Korsakoff syndrome is a brain disorder linked to chronic alcohol use and thiamine (vitamin B1) deficiency. It affects memory and coordination but is not a disease of the spinal cord. D. Alzheimer’s disease is the most common form of dementia and is strictly a brain disorder, not one that affects the spinal cord.