The striatum multiplexes contextual and kinematic information to constrain motor habits execution.

The striatum multiplexes contextual and kinematic information to constrain motor habits execution.
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DOI:
10.1038/nn.3924
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发表时间:
2015-03
影响因子:
25
通讯作者:
Robbel, David
Robbel, David
中科院分区:
医学1区
文献类型:
--
作者:
Rueda-Orozcol, Pavel E.;Robbel, David

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纹状体是获得程序性记忆所必需的,但一旦学习发生,纹状体对运动控制的作用尚不清楚。在这里,我们创建了一个任务,让大鼠学习一个困难的运动序列,其特征是根据空间和时间限制调整运行速度的微调变化。经过训练和广泛的练习,我们发现这种行为是习惯性的,但背外侧纹状体(DLS)的四极管记录显示了跑速度、位置和时间的连续综合表征。这些表征在幼稚的大鼠中很弱,在手工引导下执行相同的序列,学习后发展缓慢。最后,在训练有素的动物中,DLS的失活保留了序列的结构,同时增加了它的逐个试验的可变性。我们的结论是,在学习后,DLS不断整合与任务相关的信息,以约束运动习惯的执行。我们的工作提供了一个直接的机制,通过这个机制,基底节可能有助于习惯的形成和运动控制。
The striatum is required for the acquisition of procedural memories but its contribution to motor control once learning has occurred is unclear. Here we created a task in which rats learned a difficult motor sequence characterized by fine-tuned changes in running speed adjusted to spatial and temporal constraints. After training and extensive practice, we found that the behavior was habitual yet tetrode recordings in the dorsolateral striatum (DLS) revealed continuous integrative representations of running speed, position and time. These representations were weak in naive rats hand-guided to perform the same sequence and developed slowly after learning. Finally, DLS inactivation in well-trained animals preserved the structure of the sequence while increasing its trial-by-trial variability. We conclude that after learning the DLS continuously integrates task-relevant information to constrain the execution of motor habits. Our work provides a straightforward mechanism by which the basal ganglia may contribute to habit formation and motor control.
通过基础神经节电路的光遗传控制对帕金森运动行为的调节。
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