Differences in response to serotonergic activation between first and higher order thalamic nuclei.

Differences in response to serotonergic activation between first and higher order thalamic nuclei.
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第一级和高级丘脑核对血清素激活的反应存在差异。

DOI:
10.1093/cercor/bhn208
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发表时间:
2009
期刊:
Cerebral cortex (New York, N.Y. : 1991)
影响因子:
--
通讯作者:
Sherman,SMurray
Sherman,SMurray
中科院分区:
--
文献类型:
--
作者:
Varela,C;Sherman,SMurray

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丘脑核团有两种类型:第一级核团,负责从皮层下传递信息;高级核团,负责从一个皮层区域向另一个皮层区域传递信息。我们最近发现,毒蕈碱激动剂去极化所有的一级和最高级的中继细胞,但高极化一个显着比例的高级中继细胞。现在,我们将这一结果扩展到多巴胺能激动剂,使用大鼠丘脑脑切片和全细胞,电流和电压钳记录中继细胞在各种第一顺序(外侧膝状体核,腹后核,和腹侧部分的内侧膝状体)和高阶核(外侧后,后内侧核,和背侧部分的内侧膝状体)。类似于毒蕈碱激动剂的作用,我们发现,第一和最高阶的中继细胞被去极化的胆碱能受体激动剂,但15%的高阶中继细胞响应超极化。因此,高阶中继细胞的不同子集被这些调制系统超极化,这可能对皮层区域之间的信息传递有影响。
Two types of thalamic nuclei have been recognized:first order, which relay information from subcortical sources, andhigher order, which may relay information from one cortical area to another. We have recently shown that muscarinic agonists depolarize all first order and most higher order relay cells but hyperpolarize a significant proportion of higher order relay cells. We now extend this result to serotonergic agonists, using rat thalamic brain slices and whole-cell, current- and voltage-clamp recordings from relay cells in various first order (the lateral geniculate nucleus, the ventral posterior nucleus, and the ventral portion of the medial geniculate body) and higher order nuclei (the lateral posterior, the posterior medial nucleus, and the dorsal portion of the medial geniculate body). Similar to the effects of muscarinic agonists, we found that first and most higher order relay cells were depolarized by serotonergic agonists, but 15% of higher order relay cells responded with hyperpolarization. Thus different subsets of higher order relay cells are hyperpolarized by these modulatory systems, which could have implications for the transfer of information between cortical areas.
DOI: --
发表时间: 2001
期刊: The Journal of pharmacology and experimental therapeutics.
影响因子: --
作者:
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DOI: 10.1073/pnas.0502843102
发表时间: 2005
期刊: Proceedings of the National Academy of Sciences of the United States of America.
影响因子: --
作者:
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DOI: 10.1152/jn.2000.83.1.588
发表时间: 2000-01-01
影响因子: 2.5
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DOI: --
发表时间: 2001
期刊: The Journal of pharmacology and experimental therapeutics.
影响因子: --
作者:
Chapin,EM;Andrade,R
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DOI: --
发表时间: 1968
影响因子: 7.3
作者:
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通讯作者: W. Douglas