关键词: 神经再生, 功能磁共振, 静息态, 任务态, 脑网络, 模块划分, 特征捆绑, Fisher’s Z变换, 连接度, 视觉刺激, 国家自然科学基金

Abstract:

It is not clear whether the method used in functional brain-network related research can be applied to explore the feature binding mechanism of visual perception. In this study, we investigated feature binding of color and shape in visual perception. Functional magnetic resonance imaging data were collected from 38 healthy volunteers at rest and while performing a visual perception task to construct brain networks active during resting and task states. Results showed that brain regions involved in visual information processing were obviously activated during the task. The components were partitioned using a greedy algorithm, indicating the visual network existed during the resting state. Z-values in the vision-related brain regions were calculated, confirming the dynamic balance of the brain network. Connectivity between brain regions was determined, and the result showed that occipital and lingual gyri were stable brain regions in the visual system network, the parietal lobe played a very important role in the binding process of color features and shape features, and the fusiform and inferior temporal gyri were crucial for processing color and shape information. Experimental findings indicate that understanding visual feature binding and cognitive processes will help establish computational models of vision, improve image recognition technology, and provide a new theoretical mechanism for feature binding in visual perception.

Key words: nerve regeneration, functional magnetic resonance imaging, resting state, task state,     , brain network, module division, feature binding, Fisher’s Z transform, connectivity, visual stimuli, NSFC grants, neural regeneration