The influence of vertical disparity gradient and cue conflict on EEG omega complexity in Panum's limiting case

Using behavioral measures and ERP technique, researchers discovered at least two factors could influence the final perception of depth in Panum's limiting case, which are the vertical disparity gradient and the degree of cue conflict between 2D and 3D shapes. Although certain ERP components have been proved to be sensitive to the different levels of these two factors, some methodological limitations existed in this technique. In this study, we proposed that the omega complexity of EEG signal may serve as an important supplement of the traditional ERP technique. We found that the trials with lower vertical gradient disparity has lower omega complexity (i.e., higher global functional connectivity) of the occipital region, especially that of the right-occipital hemisphere. Moreover, for occipital omega complexity, the trials with low cue conflict have significantly larger omega complexity than those with medium and high cue conflict. It is also found that the electrodes located in the middle-line of occipital region (i.e., POz and Oz) are more crucial to the impact of different levels of cue conflict on omega complexity than the other electrodes located in the left- and right-occipital hemisphere. These evidences demonstrated that the EEG omega complexity could reflect distinct neural activities evoked by Panum's limiting case configurations with different levels of vertical disparity gradient and cue conflict. Besides, the influence of vertical disparity gradient and cue conflict on spatial omega complexity may be regional-dependent.

from #ORL-AlexandrosSfakianakis via ola Kala on Inoreader http://ift.tt/2ACvu7k