Cerebrospinal Fluid Tau and β-Amyloid

Abstract
ALZHEIMER DISEASE (AD) is a neurodegenerative disorder that produces progressive impairments in memory, language, judgment, insight, behavior, and personality. Pathological features include neurofibrillary tangles composed of hyperphosphorylated tau, neuritic plaques composed of β-amyloid (Aβ) fibrils, and neuronal death with associated cerebral atrophy and gliosis. These pathological changes are most prominent in the hippocampus, entorhinal cortex, and association areas of the neocortex and are believed to be responsible for the clinical features.1