kognitiivsete ajufunktsioonide (mõtlemine, mälu, arutlemine, planeerimine) järkjärguline langus, mille kutsuvad esile kahjustunud ajurakud

orgaanilistel põhjustel tekkiv laiaulatuslik vaimsete võimete, eriti mälu ja otsustusvõime nõrgenemine, mis tugevasti piirab isiku sotsiaalset ja professionaalset tegevust ning vajab ravi, a progressive organic mental disorder characterized by chronic personality disintegration, confusion, disorientation, stupor, deterioration of intellectual capacity and function, and impairment of control of memory, judgment, and impulses, loss of cognitive functioning, which means the loss of the ability to think, remember, or reason, as well as behavioral abilities, to such an extent that it interferes with a person’s daily life and activities