Odor-evoked increases in olfactory bulb mitral cell spiking variability.

Odor-evoked increases in olfactory bulb mitral cell spiking variability.
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嗅球二尖瓣细胞峰电位变异性的气味诱发增加。

DOI:
10.1016/j.isci.2021.102946
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发表时间:
2021-09-24
期刊:
影响因子:
5.8
通讯作者:
Shew WL
Shew WL
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Ly C;Barreiro AK;Gautam SH;Shew WL

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The spiking variability of neural networks has important implications for how information is encoded to higher brain regions. It has been well documented by numerous labs in many cortical and motor regions that spiking variability decreases with stimulus onset, yet whether this principle holds in the OB has not been tested. In stark contrast to this common view, we demonstrate that the onset of sensory input can cause an increase in the variability of neural activity in the mammalian OB. We show this in both anesthetized and awake rodents. Furthermore, we use computational models to describe the mechanisms of this phenomenon. Our findings establish sensory evoked increases in spiking variability as a viable alternative coding strategy. Unlike sensory cortex, OB spiking variability (noise) increases at stimulus onset Modeling predicts evoked variability arises within OB rather than external sources Optogenetic OB stimulation with fixed variability validates our model prediction Covariance of spiking across neurons also increases at stimulus onset Biological sciences; Cellular neuroscience; Sensory neuroscience; Computing methodology;
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