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Fear but not awareness predicts enhanced sensory processing in fear conditioning.
Psychophysiology. 2006 Mar; 43(2):216-26.P

Abstract

It is not clear whether enhanced cortical processing of reinforced stimuli as reported by neuroimaging studies is due to expectancy of an aversive event alone or to activation of the fear system. The present study investigated cortical and autonomic responses of aware participants using an instructed fear conditioning design. Steady-state visual evoked fields (ssVEF) and heart rate change were recorded to assess sensory processing and activation of the fear system by reinforced (CS+) and nonreinforced stimuli (CS-). Participants who showed heart rate acceleration demonstrated increased ssVEFs in visual and parietal cortex during CS+ in acquisition trials. Heart rate decelerators did not show enhanced cortical activation with respect to the CS+. Participants in both groups reported awareness of CS-US contingencies. Awareness of stimulus contingency in fear conditioning seems not to be sufficient to elicit enhanced visual cortical processing.

Authors+Show Affiliations

Moratti S
Department of Psychology, University of Konstanz, Konstanz, Germany. Stephan.Moratti@uni-konstanz.de
Keil A
No affiliation info available
Miller GA
No affiliation info available

MeSH

AdultAttentionAutonomic Nervous SystemAwarenessConditioning, PsychologicalData Interpretation, StatisticalEvoked PotentialsFearFemaleHeart RateHumansMagnetoencephalographyMaleSensation

Pub Type(s)

Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16712592

Citation

Moratti, Stephan, et al. "Fear but Not Awareness Predicts Enhanced Sensory Processing in Fear Conditioning." Psychophysiology, vol. 43, no. 2, 2006, pp. 216-26.
Moratti S, Keil A, Miller GA. Fear but not awareness predicts enhanced sensory processing in fear conditioning. Psychophysiology. 2006;43(2):216-26.
Moratti, S., Keil, A., & Miller, G. A. (2006). Fear but not awareness predicts enhanced sensory processing in fear conditioning. Psychophysiology, 43(2), 216-26.
Moratti S, Keil A, Miller GA. Fear but Not Awareness Predicts Enhanced Sensory Processing in Fear Conditioning. Psychophysiology. 2006;43(2):216-26. PubMed PMID: 16712592.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fear but not awareness predicts enhanced sensory processing in fear conditioning. AU - Moratti,Stephan, AU - Keil,Andreas, AU - Miller,Gregory A, PY - 2006/5/23/pubmed PY - 2006/8/24/medline PY - 2006/5/23/entrez SP - 216 EP - 26 JF - Psychophysiology JO - Psychophysiology VL - 43 IS - 2 N2 - It is not clear whether enhanced cortical processing of reinforced stimuli as reported by neuroimaging studies is due to expectancy of an aversive event alone or to activation of the fear system. The present study investigated cortical and autonomic responses of aware participants using an instructed fear conditioning design. Steady-state visual evoked fields (ssVEF) and heart rate change were recorded to assess sensory processing and activation of the fear system by reinforced (CS+) and nonreinforced stimuli (CS-). Participants who showed heart rate acceleration demonstrated increased ssVEFs in visual and parietal cortex during CS+ in acquisition trials. Heart rate decelerators did not show enhanced cortical activation with respect to the CS+. Participants in both groups reported awareness of CS-US contingencies. Awareness of stimulus contingency in fear conditioning seems not to be sufficient to elicit enhanced visual cortical processing. SN - 0048-5772 UR - https://www.unboundmedicine.com/medline/citation/16712592/Fear_but_not_awareness_predicts_enhanced_sensory_processing_in_fear_conditioning_ DB - PRIME DP - Unbound Medicine ER -