Study of Visual Mismatch Negativity Based on Cross-Modal Experimental Pattern

Mismatch negativity (MMN) in the visual modality is currently a focus in many related areas. In our work, this problem is explored through an ERP experiment in cross-modal stimulating pattern. The result shows that an obvious negativity component related with primary visual deviant exists at the frontal and occipital lobes on the condition of non-attention. Similar to auditory MMN, this negativity has a latent period of 140~170 ms and also a modality specificity. Then it is reasonable to conclude that this negativity is a visual MMN from the memory model of visual modality with two sources-one at the frontal lobe but the other at the occipital lobe's primary visual cortex.