Experimental evidence for sparse firing in the neocortex

BarthA.L.; PouletJ.F.A.

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Experimental evidence for sparse firing in the neocortex

机译：新皮质稀疏射击的实验证据

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The advent of unbiased recording and imaging techniques to evaluate firing activity across neocortical neurons has revealed substantial heterogeneity in response properties in vivo, and that a minority of neurons are responsible for the majority of spikes. Despite the computational advantages to sparsely firing populations, experimental data defining the fraction of responsive neurons and the range of firing rates have not been synthesized. Here we review data about the distribution of activity across neuronal populations in primary sensory cortex. Overall, the firing output of granular and infragranular layers is highest. Although subthreshold activity across supragranular neurons is decidedly non-sparse, spikes are much less frequent and some cells are silent. Superficial layers of the cortex may employ specific cell and circuit mechanisms to increase sparseness.

机译：用于评估跨新皮层神经元的放电活动的无偏记录和成像技术的出现揭示了体内响应特性的显着异质性，并且少数神经元负责大多数尖峰信号。尽管稀疏放电种群具有计算优势，但尚未合成定义反应性神经元分数和放电速率范围的实验数据。在这里，我们审查有关初级感觉皮层神经元人口活动分布的数据。总体而言，颗粒层和颗粒下层的烧结产量最高。尽管跨上神经元的亚阈值活动无疑是不稀疏的，但尖峰的发生频率要低得多，一些细胞却保持沉默。皮质的表层可以采用特定的细胞和电路机制来增加稀疏性。

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《Trends in Neurosciences》 |2012年第6期|共11页
作者
BarthA.L.; PouletJ.F.A.;
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正文语种 eng
中图分类神经病学;
关键词
Coding; Kurtosis; Optimality; Pyramidal neuron; Silent neurons;

机译：编码;峰度;最优;金字塔形神经元;沉默神经元;

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1. Experimental evidence for sparse firing in the neocortex [J] . BarthA.L., PouletJ.F.A. Trends in Neurosciences . 2012,第6期

机译：新皮质稀疏射击的实验证据
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机译：值班消防员的家庭火灾和安全检查是否会减少火灾次数？瑞典南部的准实验证据
3. Background synaptic activity is sparse in neocortex. [J] . Waters J, Helmchen F The Journal of Neuroscience: The Official Journal of the Society for Neuroscience . 2006,第32期

机译：新皮层中背景突触活动稀疏。
4. Experimental Evidence that Empowerment May Drive Exploration in Sparse-Reward Environments [C] . Francesco Massari, Martin Biehl, Lisa Meeden, International Conference on Development and Learning . 2021

机译：赋权的实验证据可能会在稀疏奖励环境中推动探索
5. Evidence spoliation issues affecting the fire and explosion investigator: Developing a guideline for the fire and explosion investigator to avoid and defend against evidence spoliation claims [D] . Hayden, William E. 2004

机译：影响火警和爆炸物调查员的证据污问题：为火警和爆炸物调查员制定指南，以避免和防御证据污的指控
6. Background Synaptic Activity Is Sparse in Neocortex [O] . Jack Waters, Fritjof Helmchen 2006

机译：新皮层的背景突触活动很少。
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Experimental evidence for sparse firing in the neocortex

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