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Contributed Talk Session: Thursday, August 14, 11:00 am – 12:00 pm, Room C1.03
Poster Session C: Friday, August 15, 2:00 – 5:00 pm, de Brug & E‑Hall

Auditory stimuli extend the temporal window of visual integration by modulating alpha-band oscillations

Mengting Xu¹, Biao Han², Qi Chen, Lu Shen; ¹Universiteit Gent, ²South China Normal University

Presenter: Mengting Xu

In multisensory environments, how inputs from different sensory modalities interact to shape perception is not fully understood. In this study, we investigated how auditory stimuli influence the temporal dynamics of visual processing using electroencephalography (EEG). We found that the presence of auditory stimuli led to poststimulus alpha frequency degradation, which positively correlated with the prolonged temporal window of visual integration. This was accompanied by a diminished predictive role of prestimulus alpha frequency while enhancing the predictive role of prestimulus alpha phase in shaping perceptual outcomes. To probe the underlying mechanisms, we developed a computational model that successfully replicated the core findings and revealed that auditory input extends the temporal window of visual integration by resetting alpha oscillations in the visual cortex, leading to alpha frequency reduction and an altered perception of visual events.

Topic Area: Brain Networks & Neural Dynamics

Extended Abstract: Full Text PDF