<prompt> The most common cause of organic amnestic syndrome isAlzheimers diseaseConcussionHypoxiaVitamin deficiency  <response>: organic amnesia and the amnestic syndrome. .The amnestic syndrome is characterized by disorientation paicularly in time, impairment of immediate recall, loss of recent memory, retroactive loss of remote memory of varying extent and a tendency to confabulation. Ref Harrison20th edition pg 2776 