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The neural activity of auditory conscious perception
Kate L Christison-Lagay1, Aya Khalaf1, Noah C Freedman1
1Department of Neurology, Yale University, New Haven, CT 06520, USA.
Neuroimage
|January 20, 2025
Summary
This study investigated auditory perception, finding that conscious awareness involves widespread brain activity across auditory and frontal regions. These neural dynamics suggest shared mechanisms for consciousness across different senses.
Area of Science:
- Neuroscience
- Cognitive Science
- Auditory Perception
Background:
- Understanding neural dynamics of conscious perception is crucial.
- Most research has focused on visual paradigms, leaving auditory consciousness less explored.
Purpose of the Study:
- To investigate neural mechanisms of auditory perceptual consciousness.
- To determine if shared brain mechanisms exist for consciousness across sensory modalities.
Main Methods:
- Intracranial electroencephalography (iEEG) was used in participants undergoing an auditory threshold task.
- Broadband gamma power, reflecting local neural activity, was analyzed from over 2,800 grey matter electrodes.
Main Results:
- Perceived auditory stimuli showed simultaneous activity in early auditory regions, right caudal middle frontal gyrus, and non-auditory thalamus.
- A subsequent wave of activity spread through auditory association, parietal, and frontal cortices for perceived sounds.
- Unperceived auditory stimuli exhibited significant activity solely within early auditory regions.
Conclusions:
- Auditory perception involves widespread cortical and subcortical network activation.
- These networks are similar to those identified in visual consciousness.
- Findings suggest shared neural mechanisms underlie conscious perception across sensory modalities.
Keywords:
Auditory perceptionAwarenessConsciousnessECOGEEGElectrophysiologyHearingIntracranial electroencephalographyThalamusMore Related Videos
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