Answer:
Alzheimer's disease is a neurocognitive disorder marked by neural plaques, often with onset after age 80, and entailing progressive decline in memory an other cognitive abilities.
Step-by-step explanation:
Alzheimer's disease is a progressive, degenerative and incurable neurological brain disease that causes deterioration of brain nerve cells and ultimately death resulting in entailing progressive decline in memory and other cognitive abilities.
The deterioration is caused especially after the age of 80 by a buildup of abnormal substances called amyloid plaques (an insoluble protien deposit) and neurofibrillary tangles.
Hence, the answer is Alzheimer's disease.