alzheimer disease. hippocampus. close-up of neurons with neurofibrillary tangles and amyloid plaques

alzheimer dementia disease 039 neuron alzheimers neurofibrillary tangles amyloid plaques brain atrophy neurodegeneration cross cerebral cortex enlarged ventricle hippocampus closeup memory mental neurology mind illness patient disorder treatment parkinson problem psychology loss thinking old human poster therapy senior damage injury elderly tau cognitive decline protein neuroinflammation neuropathology vector