Allen Institute Openscope - Barcoding

Some visual neurons have been shown to respond to white noise flicker visual stimuli with high temporal precision, particularly retinal ganglion cells and LGN relay cells. Responses to white noise stimulation are useful for a variety of analyses, including information theoretic measures and generative models of precise spike timing. However the literature was lacking data on responses to white noise in cortical visual areas, or in the visual stream flowing through the superior colliculus.

This experiment used the OpenScope Neuropixels passive viewing protocol, and displayed visual stimuli modulated in time by a short, repeated white noise sequence. The visual stimulus was either a spatially uniform field whose luminance was modulated in time (Full Field Flicker), or a standing sinusoidal grating whose contrast was modulated in time (Static Gratings). Perhaps surprisingly, most cortical visual neurons responded well to full-field flicker white noise. To obtain large populations of neurons in subcortical areas, roughly half of the mice were recorded in a novel electrode configuration.

When white noise visual stimuli are presented repeatedly and the neural responses displayed as spike rasters, the rasters look remarkably like UPC codes or bar codes. The same bar-code-like patterns have been found in neurons recorded in different individual animals, and even neurons in different species. We speculated that these barcodes could be used as identifiers of discrete cell types. The Temporal Barcode Dataset provides "barcodes" for visually responsive neurons throughout the mouse brain, enabling a test of this hypothesis.

已有研究证实，部分视觉神经元可对**白噪声闪烁视觉刺激**产生高时间精度的响应，其中尤以视网膜神经节细胞与外侧膝状体核（Lateral Geniculate Nucleus, LGN）中继细胞为典型。白噪声刺激响应可应用于多种分析场景，包括信息论测度计算与精确锋电位时序生成模型构建。但现有学术文献仍缺乏皮层视觉脑区以及上丘视觉通路中神经元对白噪声刺激的响应数据。
本实验采用**OpenScope Neuropixels**被动观测范式，使用短时重复白噪声序列对视觉刺激进行时域调制。所采用的视觉刺激分为两类：一类是时域亮度调制的空间均匀光场（全视野闪烁，Full Field Flicker），另一类是时域对比度调制的静止正弦光栅（静态光栅，Static Gratings）。令人意外的是，绝大多数皮层视觉神经元均可对全视野闪烁白噪声产生良好响应。为了在皮层下脑区获取大规模神经元群体数据，实验中约半数小鼠采用了新型电极配置完成记录。
当重复呈现白噪声视觉刺激，并将神经元响应以锋电位 raster 图形式展示时，这类图形外观与通用商品条码（UPC codes）或普通条形码极为相似。此类类条形码模式不仅在不同个体动物的记录神经元中被观测到，甚至在不同物种的神经元中也存在。我们推测，此类条形码可作为离散细胞类型的识别标识。本时间条形码数据集（Temporal Barcode Dataset）为全小鼠脑内的视觉响应神经元提供了“条形码”数据，从而可对该假说开展验证。

搜集汇总

背景与挑战

背景概述

该数据集由艾伦研究所发布，专注于小鼠视觉神经元对白噪声刺激的高时间精度响应研究，使用Neuropixel技术进行细胞外电生理记录，涵盖新皮层的兴奋性和抑制性神经元，适用于神经信息分析和尖峰时序建模。数据集包含94个文件，总大小为200.2 GB，采用开放获取许可（CC-BY-4.0），并基于Neurodata Without Borders (NWB)标准，支持神经科学领域的可重复研究。