Journal of Neuroscience, Vol 1, 635-640, Copyright © 1981 by Society for Neuroscience
Two forms of human amnesia: an analysis of forgetting
LR Squire
An analysis of forgetting was applied to patients with Korsakoff's
syndrome, patients receiving bilateral electroconvulsive therapy (ECT), and
case N. A. who has chronic amnesia for verbal material. Patients with
Korsakoff's syndrome and case N. A. exhibited a normal forgetting rate,
whereas patients receiving ECT exhibited abnormally rapid forgetting. Based
on previous findings for the patient H. M., on indirect evidence that the
amnesia associated with ECT might be related to temporal lobe dysfunction,
and on the diencephalic distribution of lesions in case N. A. and in
Korsakoff's syndrome, these results support the hypothesis that these
amnesias are distinct syndromes of memory dysfunction. Thus, the stage of
memory function disrupted may be different in the two circumstances, and
medial temporal and diencephalic brain regions may normally contribute in
different ways to the formation of memory.