"Multiple sclerosis (MS) is the most common demyelinating disease,[8] in which the insulating covers of nerve cells in the brain and spinal cord are damaged.[3] This damage disrupts the ability of parts of the nervous system to transmit signals, resulting in a range of signs and symptoms, including physical, mental, and sometimes psychiatric problems."
https://en.m.wikipedia.org/wiki/Multiple_sclerosis
"Multiple sclerosis (MS) is the most common demyelinating disease,[8] in which the insulating covers of nerve cells in the brain and spinal cord are damaged.[3] This damage disrupts the ability of parts of the nervous system to transmit signals, resulting in a range of signs and symptoms, including physical, mental, and sometimes psychiatric problems." https://en.m.wikipedia.org/wiki/Multiple_sclerosis