Squire has used dissociations in its effect on implicit and explicit processes to argue for multiple systems.
The limits of this state were documented in papers by Hirst and Volpe. The fact that it can be induced by the drug midazolam has been used by cognitive psychologists to study it in the lab. One attempt to explain these effects is via a computational binding model, one example of which is Reder's source activation confusion model.  Squire has used dissociations in its effect on implicit and explicit processes to argue for multiple systems. Lacking thiamin can lead to Korsakoff's syndrome, which can result in damange to the dienchephalon, which can also result in this. Caused by damage to the medial temporal lobe, or specifically, the hippocampus, its most famous sufferer was the patient H.M. FTP identify this psychological condition in which the brain is unable to form new long term memories.
The limits of this state were documented in papers by Hirst and Volpe.
anterograde amnesia (prompt on "amnesia")