Predicting Subjective Affective Salience from Cortical Responses to Invisible Object Stimuli

  • Schmack K
  • Burk J
  • Haynes J
 et al. 
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Abstract

The affective value of a stimulus substantially influences its potency to gain access to awareness. Here,we sought to elucidate the neural mechanisms underlying such affective salience in a combined behavioral and fMRI experiment. Healthy individuals with varying degrees of spider phobiawere presented with pictures of spiders and flowers suppressed fromviewby continuous flash suppression. Applying multivoxel pattern analysis, we found that the average time that spider stimuli took relative to flowers to gain access to awareness in each participant could be decoded from fMRI signals evoked by suppressed spider versus flower stimuli in occipitotemporalandorbitofrontal cortex. Our results indicate neural signals duringunconscious processing of complex visual information in orbitofrontal and ventral visual areas predict access to awareness of this information, suggesting a crucial role for these higher-level cortical regions in mediating affective salience.

Author-supplied keywords

  • continuous flash suppression
  • functional magnetic resonance imaging
  • orbitofrontal cortex
  • unconscious processing
  • ventral visual cortex

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Authors

  • Katharina Schmack

  • Julia Burk

  • John Dylan Haynes

  • Philipp Sterzer

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