alzheimer`s disease. neurons and brain

abnormal alzheimer alzheimers amyloid anatomy atrophy brain cell central cerebral cortex cytology degenerates degenerating degeneration degenerative dementia disease dystrophy education halves healthcare healthy human insanity medical medicine memory microglia nerve nervous neural neurological neurology neuron neuronal neurons plaque plaques protein psychiatry psychological psychology science senile senility synapse system unhealthy