degenerative disease of the nervous system or parkinson's disease

long term neurodegenerative motor system disorder parkinson39aph39s disease substantia nigra dementia parkinsons depression psychiatry migraine neuron multiple sclerosis nerve cell nervous elderly network stroke alzheimer neurology medicine schizophrenia palsy parkinson autism brain brainstorm cerebral mental shaking conceptual anxiety medical dopaminergic epilepsy impulse bipolar mind sciatica anatomy senior patient health care diagnosis disability treatment memory sick degenerative 39aph39