AMNESIA dementia !) means:loss of memories. !) means:loss of mental functions. 2) types:neurological\organic amnesia & 2) types: lewy body dementia, psychogenic\dissociative amnesia. vascular dementia. 3) causes: damage to limbic system of brain, 3)causes:stroke,toxic reactions to which regulates memory. drugs & alcohol. 4) symptoms:impaired ability to learn & 4)symptoms:memory loss, remember. madness. 5) no specific treatment. 5)treatment of medications such as Aricept,Exelon,Razadyne & Namenda.