n. area of the brain responsible for memory, learning, and attention. Includes the cerebral cortex and hippocampus. When acetylcholine is reduced and cholinergic neurons are affected, Alzheimer's disease may manifest as one form of subtle damage. Amnesia and confabulation are also a result of more extensive damage.

BASAL FOREBRAIN: "To help diagnose Alzheimer's disease, scientists now make use of MRI scans in order to detect any loss of function in the basal forebrain."