disorder, upset - condition in which there is a disturbance of normal functioning; "the doctor prescribed some medicine for the disorder"; "everyone gets stomach upsets from time to time"

demyelination - loss of the myelin covering of some nerve fibers resulting in their impaired function

dystrophy - any degenerative disorder resulting from inadequate or faulty nutrition

disseminated multiple sclerosis, disseminated sclerosis, MS, multiple sclerosis - a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers

paralysis agitans, Parkinson's, Parkinson's disease, Parkinson's syndrome, Parkinsonism, shaking palsy - a degenerative disorder of the central nervous system characterized by tremor and impaired muscular coordination

chorea - any of several degenerative nervous disorders characterized by spasmodic movements of the body and limbs