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Abstract:
Abstract: Although neural synchronization between different
cortex is considered as a mechanism underlying perceptual
integration, little research has been focused on whether neural
synchronization is mediated by attention or it is
self-organization. In this study, participants were required to
respond as quickly as to different stimuli accompanied by a sound
at the probability of 1/3 that was presented to attract
participants' attention, while EEG was recorded. Time-frequency
coherence that was calculated with multivariate autoregressive
model was used to capture transient neural synchronization. The
behavior data showed that reaction time was longer in the sound
condition than in the command condition, indicating that
participants' attention was attracted when unpredictable sound was
presented. The coherence between occipital and striate was found in
all condition, which support previous hypothesis that neural
synchronization is used to integrate perception. The second finding
was that coherence appeared almost at same time in all condition,
implying that perceptual integration is independent on the
attention. The results suggest that neural synchronization
underlying perceptual integration is self-organization, in other
words, perceptual integration depends primarily on low-level
processes based on neural circuit, but not on high-level processes
including attention.
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