The Analysis on the Brain Cognitive Mechanism and Audio-Visual Evoked EEG Feature Extraction
Xiaoya Qiao · Ceshi jishu xuebao · 2013
To investigate the audio-visual cross-sensory brain cognitive mechanism, an experimental paradigm for audio-visual stimulation was designed based on the Stroop effect. By using Neuroscan40 lead brain event related potentialsinstrument, the audio-visual evoked EEG signal was continuously and dynamically collected. We adopted ICA method to remove artifact and used the coherent averaging method combined with AR model to extractevoked P300 potentials.By compared with the amplitude and latency of P300 potentials,the information integrated function, crossed interference effect and attention rivalry mechanism were investigated on the visual and auditory evoked brain cognitive mode. The results show that the brain integratesinformation more easily under the stimulus of audio- visual dual channel, and cognition behaves the visual-dominate and auditory-accessorial collaborative action. Meanwhile, the crossed interference effect is more intensively and more dominantly on vision impacting hearing. This research can be used in the neural information processing, cerebral cognitive science and BCI system.