Synchronous oscillatory neural ensembles for rules in the prefrontal cortex.

Synchronous oscillatory neural ensembles for rules in the prefrontal cortex.
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DOI:
10.1016/j.neuron.2012.09.029
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发表时间:
2012-11-21
期刊:
影响因子:
16.2
通讯作者:
Miller EK
Miller EK
中科院分区:
医学1区
文献类型:
--
作者:
Buschman TJ;Denovellis EL;Diogo C;Bullock D;Miller EK

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智能行为需要获得并遵循规则。规则定义了我们的行为应该如何适应不同的情况。为了理解其神经机制,我们同时记录了背外侧前额叶皮层(PFC)的多个电极,而猴子在两个规则之间切换(对颜色和方向的反应)。我们发现的证据表明,振荡同步的局部场电位(LFPs)形成的神经合奏代表的规则:有规则特定的同步增加在“β”(19-40赫兹)频率之间的电极。此外,个别PFC神经元同步到LFP合奏对应于当前的规则(颜色与方向)。此外,合奏编码的行为主导方向规则显示增加的“阿尔法”(6-16赫兹)同步时,准备应用替代(较弱)的颜色规则。这表明β频率同步选择相关的规则集合,而α频率同步取消选择更强但目前不相关的集合。同步性可以动态地从更大的重叠回路中塑造与任务相关的神经集合。
Intelligent behavior requires acquiring and following rules. Rules define how our behavior should fit different situations. To understand its neural mechanisms, we simultaneously recorded from multiple electrodes in dorsolateral prefrontal cortex (PFC) while monkeys switched between two rules (respond to color versus orientation). We found evidence that oscillatory synchronization of local field potentials (LFPs) formed neural ensembles representing the rules: there were rule-specific increases in synchrony at “beta” (19–40 Hz) frequencies between electrodes. In addition, individual PFC neurons synchronized to the LFP ensemble corresponding to the current rule (color versus orientation). Furthermore, the ensemble encoding the behaviorally dominant orientation rule showed increased “alpha” (6–16 Hz) synchrony when preparing to apply the alternative (weaker) color rule. This suggests that beta-frequency synchrony selects the relevant rule ensemble, while alpha-frequency synchrony deselects a stronger, but currently irrelevant, ensemble. Synchrony may act to dynamically shape task-relevant neural ensembles out of larger, overlapping circuits.
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