AI Article Synopsis
- The study investigates the differences in brain responses related to conscious perception of visual and auditory stimuli within the same experimental setup.
- The researchers found specific negative amplitude responses in the brain between 200 and 300 milliseconds after stimuli presentation, indicating that conscious awareness varies by sensory modality.
- They also identified a later positive amplitude that had both specific and general features across modalities, suggesting it relates to higher-level cognitive processes and decision-making.
Article Abstract
To date, most studies on the event-related potential (ERP) correlates of conscious perception have examined a single perceptual modality. We compared electrophysiological correlates of visual and auditory awareness in the same experiment to test whether there are modality-specific and modality-general correlates of conscious perception. We used near threshold stimulation and analyzed event-related potentials in response to aware and unaware trials in visual, auditory and bimodal conditions. The results showed modality-specific negative amplitude correlates of conscious perception between 200 and 300 ms after stimulus onset. A combination of these auditory and visual awareness negativities was observed in the bimodal condition. A later positive amplitude difference, whose early part was modality-specific, possibly reflecting access to global workspace, and later part shared modality-general features, possibly indicating higher level cognitive processing involving the decision making, was also observed.
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| http://dx.doi.org/10.1016/j.neuropsychologia.2022.108154 | DOI Listing |
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