Reciprocal Connectivity of Identified Color-Processing Modules in the Monkey Inferior Temporal Cortex
Reciprocal Connectivity of Identified Color-Processing Modules in the Monkey Inferior Temporal Cortex
复制标题
DOI：
10.1093/cercor/bhq211
复制
发表时间：
2011-06-01
期刊：
影响因子：
3.7
通讯作者：
Komatsu, Hidehiko
中科院分区：
文献类型：
--
作者：
Banno, Taku;Ichinohe, Noritaka;Komatsu, Hidehiko
下颞叶 (IT) 皮层是腹侧视觉通路中的最后一个单峰视觉区域，对于颜色辨别至关重要。最近的成像和电生理学研究揭示了前IT皮质（AIT）和后IT皮质（PIT）中存在几个不同的颜色选择细胞斑块。为了了解 IT 皮层颜色处理的神经机制，在本研究中，我们将解剖追踪方法与电生理单元记录相结合，以研究猴子 IT 皮层中已识别的颜色选择细胞簇的解剖学联系。我们发现 AIT 中的颜色簇接收来自 PIT 中颜色簇以及其他枕颞区、颞上沟、前额叶和顶叶皮质中离散细胞簇的投影。 PIT 中标记细胞的分布与该区域中生理学鉴定的颜色选择细胞的分布密切对应。此外，后部颜色簇中的逆行示踪剂注射导致前部颜色簇中的标记细胞。因此，颞叶颜色处理模块在分布式网络内形成相互互连的循环。
The inferior temporal (IT) cortex is the last unimodal visual area in the ventral visual pathway and is essential for color discrimination. Recent imaging and electrophysiological studies have revealed the presence of several distinct patches of color-selective cells in the anterior IT cortex (AIT) and posterior IT cortex (PIT). To understand the neural machinery for color processing in the IT cortex, in the present study, we combined anatomical tracing methods with electrophysiological unit recordings to investigate the anatomical connections of identified clusters of color-selective cells in monkey IT cortex. We found that a color cluster in AIT received projections from a color cluster in PIT as well as from discrete clusters of cells in other occipitotemporal areas, in the superior temporal sulcus, and in prefrontal and parietal cortices. The distribution of the labeled cells in PIT closely corresponded with that of the physiologically identified color-selective cells in this region. Furthermore, retrograde tracer injections in the posterior color cluster resulted in labeled cells in the anterior cluster. Thus, temporal lobe color-processing modules form a reciprocally interconnected loop within a distributed network.