Bhattacharya Joydeep, Petsche Hellmuth
Commission for Scientific Visualization, Austrian Academy of Sciences, Sonnenfelsgasse 19/2, A-1010, Vienna, Austria.
Brain Res Cogn Brain Res. 2002 Apr;13(2):179-86. doi: 10.1016/s0926-6410(01)00110-0.
Functional and topographical differences between two groups, artists and non-artists, during the performances of visual perception and imagery of paintings were presented by means of EEG phase synchrony analysis. In artists as compared with non-artists, significantly higher phase synchrony was found in the high frequency beta and gamma bands during the perception of the paintings; in the low frequency bands (primarily delta), phase synchrony was mostly enhanced during imagery. Strong decreases in phase synchrony of alpha were found primarily in artists for both tasks. The right hemisphere was found to present higher synchrony than the left in artists, whereas hemispheric asymmetry was less significant in non-artists. In the artists, enhanced synchrony in the high frequency band is most likely due to their enhanced binding capabilities of numerous visual attributes, and enhanced synchrony in the low frequency band seems to be due to the higher involvement of long-term visual memory mostly in imagery. Thus, the analysis of phase synchrony from EEG signals yields new information about the dynamical co-operation between neuronal assemblies during the cognition of visual art.
通过脑电图相位同步分析，呈现了艺术家和非艺术家两组在绘画视觉感知和意象表现过程中的功能和地形差异。与非艺术家相比，艺术家在绘画感知过程中，高频β和γ波段的相位同步显著更高；在低频波段（主要是δ波），意象过程中相位同步大多增强。在两项任务中，主要在艺术家群体中发现α波相位同步大幅下降。研究发现，艺术家右半球的同步性高于左半球，而非艺术家的半球不对称性则不太明显。在艺术家中，高频波段同步性增强很可能是由于他们对众多视觉属性的绑定能力增强，而低频波段同步性增强似乎是由于长期视觉记忆在意象过程中的更高参与度。因此，对脑电图信号相位同步的分析产生了关于视觉艺术认知过程中神经元组件动态合作的新信息。
