memory lapses, forgetting things, degenerative disease. brain problems. parkinson and alzheimer desease. mental health

brain degenerative disease cancer stroke alzheimer parkinson memory lapses cerebellum aneurysm rendering anatomy confusion creativity dementia depression disorder frustration function head headache health human illness injury loss man medical medicine mental mind neural network neurology neurons pain painful problem problems psychology rehabilitation sadness schizophrenia stress synapses thought trauma art abstract concept forgetting desease