Higher-Order Thalamic Circuits Channel Parallel Streams of Visual Information in Mice.

Higher-Order Thalamic Circuits Channel Parallel Streams of Visual Information in Mice.
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DOI:
10.1016/j.neuron.2019.02.010
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发表时间:
2019-04-17
期刊:
影响因子:
16.2
通讯作者:
Olsen SR
Olsen SR
中科院分区:
医学1区
文献类型:
--
作者:
Bennett C;Gale SD;Garrett ME;Newton ML;Callaway EM;Murphy GJ;Olsen SR

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Higher-order thalamic nuclei, such as the visual pulvinar, play essential roles in cortical function by connecting functionally related cortical and subcortical brain regions. A coherent framework describing pulvinar function remains elusive because of its anatomical complexity and involvement in diverse cognitive processes. We combined large-scale anatomical circuit mapping with high-density electrophysiological recordings to dissect a homolog of the pulvinar in mice, the lateral posterior thalamic nucleus (LP). We define three broad LP subregions based on correspondence between connectivity and functional properties. These subregions form corticothalamic loops biased toward ventral or dorsal stream cortical areas and contain separate representations of visual space. Silencing the visual cortex or superior colliculus revealed that they drive visual tuning properties in separate LP subregions. Thus, by specifying the driving input sources, functional properties, and downstream targets of LP circuits, our data provide a roadmap for understanding the mechanisms of higher-order thalamic function in vision. Bennett et al. divide the mouse pulvinar (LP) into 3 subregions with distinct anatomical connections and functional properties. They find that the superior colliculus conveys object motion to ventral stream cortical areas via posterior LP, whereas anterior LP targets dorsal stream areas.
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