Sun Mengdan, Xin Xiaoyang, Ying Haojiang, Hu Luming, Zhang Xuemin
12582Soochow University, China.
12377Zhejiang University, China.
Perception. 2023 Mar;52(3):195-212. doi: 10.1177/03010066221147120. Epub 2023 Jan 3.
Categorical perception (CP) describes our tendency to perceive the visual world in a categorical manner, suggesting that high-level cognition may affect perception. While most studies are conducted in static visual scenes, Sun and colleagues found CP effects of color in multiple object tracking (MOT). This study used functional magnetic resonance imaging to investigate the neural mechanism behind the categorical effects of color in MOT. Categorical effects were associated with activities in a broad range of brain regions, including both the ventral (V4, middle temporal gyrus) and dorsal pathways (MT + /V5, inferior parietal lobule) of feature processing, as well as frontal regions (middle frontal gyrus, medial superior frontal gyrus). We proposed that these regions are hierarchically organized and responsible for distinct functions. The color-selective V4 encodes color categories, making cross-category colors more discriminable than within-category colors. Meanwhile, the language and/or semantic regions encode the verbal information of the colors. Both visual and nonvisual codes of color categories then modulate the activities of motion-sensitive MT + areas and frontal areas responsible for attentional processes.
类别知觉（CP）描述了我们以类别方式感知视觉世界的倾向，这表明高级认知可能会影响感知。虽然大多数研究是在静态视觉场景中进行的，但孙及其同事发现了多目标跟踪（MOT）中颜色的CP效应。本研究使用功能磁共振成像来探究MOT中颜色类别效应背后的神经机制。类别效应与广泛的脑区活动有关，包括特征处理的腹侧通路（V4、颞中回）和背侧通路（MT+ /V5、顶下小叶），以及额叶区域（额中回、额上内侧回）。我们提出，这些区域是分层组织的，负责不同的功能。颜色选择性的V4编码颜色类别，使跨类别颜色比类别内颜色更易于区分。同时，语言和/或语义区域编码颜色的语言信息。然后，颜色类别的视觉和非视觉编码都会调节负责注意过程的运动敏感MT+区域和额叶区域的活动。
