<prompt> Features of Alzheimer;s disease are all ExceptNarrowing of ventriclesHirano bodiesAmyloidNeuritic plaques  <response>: Hirano bodies are intracellular aggregates of actin and actin-associated proteins. Hirano bodies are found in the nerve cells of individuals afflicted with ceain neurodegenerative disorders, such as Alzheimers disease and Creutzfeldt-Jakob disease. Senile plaques also known as neuritic plaques are extracellular deposits of amyloid beta in the grey matter of the brain. Alzheimers disease is a progressive disorder that causes brain cells to waste away degenerate and die. Alzheimers disease is the most common cause of dementia -- a continuous decline in thinking, behavioral and social skills that disrupts a persons ability to function independently Refer robbins 9e p834 