a disease of the brain tissue in which the myelin sheath (the fatty material wrapped around and insulating the parts of nerve cells that conduct nerve impulses in the brain to other nerve cells) deteriorates, thereby causing varying degrees of muscular dysfunction, paralysis, and muscle tremors is

Multiple sclerosis (MS).

Explanation:

Multiple sclerosis (MS) is a condition that can affect the brain and spinal cord, causing a wide range of potential symptoms, including problems with vision, arm or leg movement, sensation or balance. This is due to the deterioration of the myelin sheath, like the exercise details, which causes varying degrees of muscular dysfunction, paralysis and muscle tremors.

Some common early signs of MS:

Vision problems, tingling and numbness, pain and spasms, weakness or fatigue.

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