A functional cerebral response to frightening visual stimulation

The defense reaction, a fundamental reflex in the human behavioral response to threat, is characterized by anxiety and increased activity of the sympathetic nervous system. To study changes in regional cerebral blood flow (rCBF) related to the defense reaction, volunteers with snake phobia were inve...

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Veröffentlicht in:Psychiatry research 1993-04, Vol.50 (1), p.15-24
Hauptverfasser: Wik, Gustav, Fredrikson, Mats, Ericson, Kaj, Eriksson, Lars, Stone-Elander, Sharon, Greitz, Torgny
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container_issue 1
container_start_page 15
container_title Psychiatry research
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creator Wik, Gustav
Fredrikson, Mats
Ericson, Kaj
Eriksson, Lars
Stone-Elander, Sharon
Greitz, Torgny
description The defense reaction, a fundamental reflex in the human behavioral response to threat, is characterized by anxiety and increased activity of the sympathetic nervous system. To study changes in regional cerebral blood flow (rCBF) related to the defense reaction, volunteers with snake phobia were investigated with positron emission tomography. The relative rCBF during phobogenic visual stimulation was increased in the secondary visual cortex but reduced in the hippocampus, orbitofrontal, prefrontal, temporopolar, and posterior cingulate cortex compared with that observed during neutral visual stimulation. The relative rCBF under aversive stimulation was intermediate between phobic and neutral stimulation. The rCBF patterns observed are suggested to represent a functional cerebral correlate to the visually elicited defense reaction and its associated emotions.
doi_str_mv 10.1016/0925-4927(93)90020-I
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subjects Adult
Adult and adolescent clinical studies
Analysis of Variance
anxiety
Anxiety disorders. Neuroses
Biological and medical sciences
Cerebrovascular Circulation - physiology
defense reaction
Fear
Female
Heart Rate - physiology
Humans
Medical sciences
Phobic Disorders - diagnostic imaging
Phobic Disorders - physiopathology
Photic Stimulation
Positron emission tomography
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
simple phobia
Tomography, Emission-Computed
Visual Cortex - blood supply
Visual Cortex - diagnostic imaging
title A functional cerebral response to frightening visual stimulation
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