Independent control of gamma and theta activity by distinct interneuron networks in the olfactory bulb.

Independent control of gamma and theta activity by distinct interneuron networks in the olfactory bulb.
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DOI:
10.1038/nn.3760
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发表时间:
2014-09
影响因子:
25
通讯作者:
Schaefer, Andreas T.
Schaefer, Andreas T.
中科院分区:
医学1区
文献类型:
--
作者:
Fukunaga, Izumi;Herb, Jan T.;Kollo, Mihaly;Boyden, Edward S.;Schaefer, Andreas T.

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大脑中的回路具有在不同时间尺度上协调活动的非凡能力,但不同的回路如何相互作用以塑造不同的节奏仍然没有解决。嗅球是一个经典的例子,慢的θ和快的γ节奏共存。此外,抑制性中间神经元通常与节律产生有关,被分成不同的层,整齐地将局部图案与全局图案分开。在这里,结合细胞内记录在体内与电路特异性光遗传学干扰,我们解剖的贡献,抑制小鼠嗅球的节律活动。我们发现,这两个抑制电路控制不同的时间尺度上的节奏:本地,肾小球网络协调θ活动,调节基线和气味诱发的抑制;颗粒细胞编排伽马同步和尖峰时间。令人惊讶的是,他们没有贡献的基线节奏,或嗅耦合气味诱发的抑制,尽管他们的感知优势。因此,θ和γ时间尺度上的活动是由嗅球中独立的、可分离的抑制网络控制的。
Circuits in the brain possess a remarkable ability to orchestrate activities on different timescales, but how distinct circuits interact to sculpt diverse rhythms remains unresolved. The olfactory bulb is a classic example where slow, theta, and fast, gamma, rhythms coexist. Furthermore inhibitory interneurons generally implicated in rhythm generation are segregated into distinct layers, neatly separating local from global motifs. Here, combining intracellular recordings in vivo with circuit-specific optogenetic interference we dissect the contribution of inhibition to rhythmic activity in the mouse olfactory bulb. We found that the two inhibitory circuits control rhythms on distinct timescales: local, glomerular networks coordinate theta activity, regulating baseline and odor-evoked inhibition; granule cells orchestrate gamma synchrony and spike timing. Surprisingly, they did not contribute to baseline rhythms, or sniff-coupled odor-evoked inhibition despite their perceived dominance. Thus, activities on theta and gamma time scales are controlled by separate, dissociable inhibitory networks in the olfactory bulb.
θ-γ神经代码。
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影响因子: 16.2
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影响因子: 25
作者:
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期刊: NEURON
影响因子: 16.2
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