Visual cortex ablations do not prevent extinction of fear-potentiated startle using a visual conditioned stimulus.
Behav Neural Biol
; 60(3): 259-70, 1993 Nov.
Article
in En
| MEDLINE
| ID: mdl-8297322
ABSTRACT
Following observations in the literature that sensory cortex ablations prevent extinction of conditioned fear, the present experiments tested the generality of this finding by examining whether visual cortex ablations would prevent extinction of conditioned fear as assessed by fear-potentiated startle using a visual conditioned stimulus. Consistent with previous reports, visual cortex ablations did not prevent the acquisition or expression of fear-potentiated startle to a visual conditioned stimulus. More importantly, visual cortex ablations did not prevent extinction of fear-potentiated startle to a visual conditioned stimulus, nor did they reverse preoperatively established extinction, indicating that sensory cortex is not required for extinction of conditioned fear in all situations.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Reflex, Startle
/
Visual Cortex
/
Conditioning, Psychological
/
Fear
Limits:
Animals
Language:
En
Journal:
Behav Neural Biol
Year:
1993
Document type:
Article