Am J Psychiatry 1987; 144:989-995
Copyright © 1987 by American Psychiatric Association
A neuropsychological hypothesis explaining posttraumatic stress disorders
LC Kolb
The author reports findings from recent psychophysiological and biochemical
research on Vietnam combat veterans with chronic posttraumatic stress
disorder. Applying these data and the analogy of the known functional and
structural defects in the peripheral (cranial) sensory system consequent to
high-intensity stimulation, he hypothesizes that cortical neuronal and
synaptic changes occur in posttraumatic stress disorder as the consequence
of excessive and prolonged sensitizing stimulation leading to depression of
habituating learning. He postulates that the "constant" symptoms of the
disorder are due to the changes in the agonistic neuronal system which
impair cortical control of hindbrain structures concerned with aggressive
expression and the sleep-dream cycle.
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