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- W1985839160 abstract "The visual system is biased toward sensory cues that have been associated with danger or harm through temporal co-occurrence. An outstanding question about conditioning-induced changes in visuocortical processing is the extent to which they are driven primarily by top-down factors such as expectancy or by low-level factors such as the temporal proximity between conditioned stimuli and aversive outcomes. Here, the authors examined this question using 2 different differential aversive conditioning experiments: participants learned to associate a particular grating stimulus with an aversive noise that was presented either in close temporal proximity (delay conditioning experiment) or after a prolonged stimulus-free interval (trace conditioning experiment). In both experiments, the authors probed cue-related cortical responses by recording steady-state visual evoked potentials. Although behavioral ratings indicated that all participants successfully learned to discriminate between the grating patterns that predicted the presence versus absence of the aversive noise, selective amplification of population-level responses in visual cortex for the conditioned danger signal was observed only when the grating and the noise were temporally contiguous. Our findings are in line with notions purporting that changes in the electrocortical response of visual neurons induced by aversive conditioning are a product of Hebbian associations among sensory cell assemblies rather than being driven entirely by expectancy-based, declarative processes." @default.
- W1985839160 created "2016-06-24" @default.
- W1985839160 creator A5054437207 @default.
- W1985839160 creator A5084887008 @default.
- W1985839160 date "2013-01-01" @default.
- W1985839160 modified "2023-10-18" @default.
- W1985839160 title "Visuocortical changes during delay and trace aversive conditioning: Evidence from steady-state visual evoked potentials." @default.
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- W1985839160 doi "https://doi.org/10.1037/a0031323" @default.
- W1985839160 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4300096" @default.
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