Basal ganglia output to the thalamus: still a paradox.

Basal ganglia output to the thalamus: still a paradox.
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基底神经节输出到丘脑:仍然是悖论。

DOI:
10.1016/j.tins.2013.09.001
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发表时间:
2013-12
影响因子:
15.9
通讯作者:
Fee MS
Fee MS
中科院分区:
医学1区
文献类型:
--
作者:
Goldberg JH;Farries MA;Fee MS

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基底神经节(BG)受体丘脑控制运动输出,但尚不清楚其活动是如何调节的。几项研究报告说,丘脑的激活是通过去抑制来自BG的抑制性苍白球传入信号的间歇来实现的。其他研究表明,丘脑的尖峰放电是由苍白球传入的抑制后的“反弹”钙尖峰触发的。最后,兴奋性皮质输入可以驱动丘脑活动,丘脑活动变得牵连,或被时间锁定,形成苍白球尖峰。我们提出了一个统一的框架,其中这些看似不同的结果来自于由兴奋性输入控制的丘脑放电“模式”的连续体。我们为在行为过程中观察到的矛盾的苍白球丘脑协同激活提供了一个机制解释,并提出了丘脑中整合了什么信息来控制行为的新问题。
The basal ganglia (BG) recipient thalamus controls motor output but it remains unclear how its activity is regulated. Several studies report that thalamic activation occurs via disinhibition during pauses in the firing of inhibitory pallidal inputs from the BG. Other studies indicate that thalamic spiking is triggered by pallidal inputs via post-inhibitory ‘rebound’ calcium spikes. Finally excitatory cortical inputs can drive thalamic activity, which becomes entrained, or time-locked, to pallidal spikes. We present a unifying framework where these seemingly distinct results arise from a continuum of thalamic firing ‘modes’ controlled by excitatory inputs. We provide a mechanistic explanation for paradoxical pallidothalamic coactivations observed during behavior and raise new questions of what information is integrated in the thalamus to control behavior.
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