dementia, conceptual showing an elderly person with progressive impairments of brain functions, distruction of

neurocognitive ftd frontotemporal illustration treatment parkinson degenerative loss intelligence concept damage disorder medical therapy old confusion male memory illness brain problem senior elderly man neurology mind depression mental alzheimer dementia progressive impairment disambiguation senility disease senile senescence feebleness psychiatry vascular lewy body lobar degeneration alzheimers parkinsons neuron network