High-fidelity vibrokinetic stimulation induces sustained changes in intercortical coherence during a cinematic
J Boasen1,2, F Giroux1, M O Duchesneau1
1Tech3Lab, HEC Montréal, Montréal, Canada.
Journal of Neural Engineering
|August 7, 2020
Summary
High-fidelity vibrokinetic (HFVK) technology enhances audiovisual immersion by altering brain activity. This study reveals HFVK causes sustained brain decoherence, potentially explaining its immersive effects.
Area of Science:
- Neuroscience
- Human-Computer Interaction
- Sensory Processing
Background:
- High-fidelity vibrokinetic (HFVK) technology enhances audiovisual (AV) entertainment immersion.
- The neurophysiological mechanisms underlying HFVK's subjective enhancement of AV immersion remain unclear.
- Understanding these mechanisms can optimize HFVK stimulus design and technology expansion.
Purpose of the Study:
- To investigate the effect of HFVK stimulation on electroencephalographic (EEG) cortical activity during an AV cinematic experience.
- To explore the relationship between HFVK-induced brain activity changes and subjective appreciation.
- To identify potential neurophysiological mechanisms of HFVK-enhanced immersion.
Main Methods:
- A between-subjects study comparing HFVK stimulation (N=11) to a control group (N=9) during a cinematic experience.
- EEG cortical activity was measured, with separate analyses for alpha-band (engagement) and theta-band (sensory processing) activities.
- Theta-band coherence analyses were performed using identified cortical seed areas.
Main Results:
- HFVK stimulation enhanced coherence between sensory/vestibular processing areas (fusiform gyrus, inferiotemporal gyrus, supramarginal gyrus) and right motor areas, particularly in appreciative subjects.
- HFVK subjects showed uniform interhemispheric decoherence with the left insula (self-processing) compared to controls.
- These findings suggest sustained decoherence between sensory and self-processing as a mechanism for HFVK immersion.
Conclusions:
- HFVK stimulation demonstrably alters brain activity during cinematic experiences.
- Sustained sensory-self processing decoherence may underlie HFVK's immersive effects.
- Appreciation of HFVK-enhanced experiences may require coordinated activity in emotional, spatial, vestibular, and motor processing hubs.
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