Topological relation of chick thalamofugal visual projections with hyper pallium revealed by three color tracers
Topological relation of chick thalamofugal visual projections with hyper pallium revealed by three color tracers
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DOI：
10.1016/j.neures.2005.03.017
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发表时间：
2005-07-01
影响因子：
2.9
通讯作者：
Nakamura, S
中科院分区：
文献类型：
--
作者：
Koshiba, M;Yohda, M;Nakamura, S
在鸟类中，从视网膜到上眼睑有两个视觉投射，即，离顶盖和离丘脑途径。后者在小鸡中是偏侧的，并建议参与视觉诱发的社会行为，如识别新奇，捕食者和同种动物。建立丘脑核团与上腭尖核团（HA）功能相关的拓扑连接图，并采用三色荧光示踪剂进行示踪研究。示踪剂沿内-外（M-L）或前-后（A-P）轴沿着连续注入HA。我们发现，HA的M-L轴和A-P轴在外侧膝状核背侧部（GLd）内分别转移到背腹轴和内外轴。也就是说，丘脑前背外侧核外侧部（DLLv）的内侧部投射到HA前部，丘脑前背外侧核腹侧部外侧部（DLLd）的腹侧部投射到HA外侧部。这一结果表明，丘脑通过各亚核团并行处理信息，并在高级丘脑呈现的拓扑图上进行协调。(c)2005年Elsevier爱尔兰有限公司和日本神经科学学会。All rights reserved.
In birds, there are two visual projections from retina to higher pallium, i.e., tectofugal and thalamofugal pathways. The latter one is lateralized in chick and suggested to be involved in visually evoked social behavior, like recognition of novelty, predator, and conspecific animals. We wanted to establish functionally relevant topological connection map between thalamic nuclei and hyperpallium apicale (HA) and carried out tracing study with three color fluorescent tracers. The tracers were serially injected in HA either along with the medial-lateral (M-L) or anterior-posterior (A-P) axis. We found that M-L axis and A-P axis in HA were transferred into the dorsal-ventral axis and the medial-lateral axis, respectively within the nucleus geniculatus lateralis pars dorsalis (GLd). In another word, the medial part of nucleus dorsolateralis anterior thalami pars lateralis (DLLv) projected to anterior part of HA and the ventral part of nucleus dorsolateralis anterior thalami pars lateralis pas ventralis (DLLd) projects to lateral HA. This result suggests that thalamus would process information in parallel through each subnuclei and elaborate coordination among them in relation to topological map presented in higher pallium. (c) 2005 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.