Brain, Vol 120, Issue 3 417-433, Copyright © 1997 by Oxford University Press
M Broman, AL Rose, G Hotson and CM Casey
Our patient (M.S.) had an abrupt onset of amnesia due to a respiratory
arrest at the age of 8 years and has been followed by one of us (A.L.R.)
for 19 years. A specially designed MRI study indicated that the
neuroanatomical localization of his lesion is restricted to the hippocampal
formation bilaterally. Comparison of M.S.'s present IQ and academic scores
with earlier scores revealed that his literacy skills, certain basic
language functions and vocabulary development were arrested by his memory
disorder. In contrast, development of mathematical skill was less
curtailed, and verbal and nonverbal logical abilities developed to adult
levels. Neuropsychological examination at the age of 27 years elicited a
pattern of memory deficits similar to those found in a case (H.M.) of known
mesial temporal lobe damage in adulthood. The neuropsychological pattern
revealed those aspects of cognitive development that do, and those that do
not, require intact memory. The limitations to intellectual development
imposed by severe amnesia in childhood are not pervasive, but rather, are
limited to specific types of abilities.
ARTICLES
Severe anterograde amnesia with onset in childhood as a result of anoxic encephalopathy
Department of Neurology, SUNY Health Science Center at Brooklyn 11203, USA.
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