alzheimer disease. neurons and dementia

alzheimer dementia disease 039 neuron alzheimers neurofibrillary tangles amyloid plaques brain atrophy neurodegeneration cross neurodegenerative closeup memory oligodendrocyte astrocyte 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 neurons 39aph39 comparison healthy nerve cells line pattern font yellow flower branch leaf design circle plant petal drawing cartoon brand tree art twig text orange