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Abstract
Dininished gating of the auditory evoked responses to repeated stimuli is a psychophysiological
defect associated with schizophrenia and several other psychiatric illnessesThe P50
wave of the auditory evoked response to the second of paired stimuli is decreased
in most normal subjects, whereas many psychotic subjects show significantly less decrement.
The aim of this experiment was to test whether the cold-pressor test, which causes
transient distress and pain accompanied by increased sympathetic activity, also causes
a transient impairment in P50 auditory sensory gating in normal control subjects.
Ten normal control subjects with normal gating of the P50 response immersed their
hands in an ice water bath for 2 min. This cold-pressor test diminished P50 auditory
gating in nine of these subjects, although the degree of impairment was highly variable
among subjects. The impairment in gating was transient, with partial resolution by
30 min. The cold-pressor test was subjectively viewed as painful and also caused blood
pressure to increase. Thus, a transient stressor can impair P50 auditory gating in
some subjects.
Keywords
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Article info
Publication history
Received in revised form:
December 23,
1992
Received:
May 21,
1992
Footnotes
☆This work was supported by USPHS Grants MH44212, MH38321, MH00728, and the Veterans Administration Medical Research Service.
Identification
Copyright
© 1993 Published by Elsevier Inc.