Suppr超能文献

视觉信号时间滤波的突触机制。

A synaptic mechanism for temporal filtering of visual signals.

作者信息

Baden Tom, Nikolaev Anton, Esposti Federico, Dreosti Elena, Odermatt Benjamin, Lagnado Leon

机构信息

MRC Laboratory of Molecular Biology, Neurobiology Division, Cambridge, United Kingdom.

MRC Laboratory of Molecular Biology, Neurobiology Division, Cambridge, United Kingdom; School of Life Sciences, University of Sussex, Brighton, United Kingdom.

出版信息

PLoS Biol. 2014 Oct 21;12(10):e1001972. doi: 10.1371/journal.pbio.1001972. eCollection 2014 Oct.

Abstract

The visual system transmits information about fast and slow changes in light intensity through separate neural pathways. We used in vivo imaging to investigate how bipolar cells transmit these signals to the inner retina. We found that the volume of the synaptic terminal is an intrinsic property that contributes to different temporal filters. Individual cells transmit through multiple terminals varying in size, but smaller terminals generate faster and larger calcium transients to trigger vesicle release with higher initial gain, followed by more profound adaptation. Smaller terminals transmitted higher stimulus frequencies more effectively. Modeling global calcium dynamics triggering vesicle release indicated that variations in the volume of presynaptic compartments contribute directly to all these differences in response dynamics. These results indicate how one neuron can transmit different temporal components in the visual signal through synaptic terminals of varying geometries with different adaptational properties.

摘要

视觉系统通过不同的神经通路传输有关光强度快速和缓慢变化的信息。我们利用体内成像技术来研究双极细胞如何将这些信号传递到视网膜内层。我们发现,突触终末的体积是一种内在属性,它有助于形成不同的时间滤波器。单个细胞通过多个大小不同的终末进行传递,但较小的终末会产生更快、更大的钙瞬变,以更高的初始增益触发囊泡释放,随后是更深刻的适应性变化。较小的终末能更有效地传递更高的刺激频率。对触发囊泡释放的全局钙动力学进行建模表明,突触前区室体积的变化直接导致了所有这些反应动力学上的差异。这些结果表明,一个神经元如何通过具有不同适应性特性的不同几何形状的突触终末来传递视觉信号中的不同时间成分。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1054/4205119/416b0463555d/pbio.1001972.g001.jpg

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验