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在小鼠皮层轴突中测量动作潜力传播速度

Oron Kotler¹, Yana Khrapunsky¹, Ilya Fleidervish¹

¹Dept. of Physiology and Cell Biology, Faculty of Health Sciences and Zelman Center for Neuroscience, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel.

|November 16, 2023

概括

本研究详细介绍了一种使用双重记录来测量轴突中的作用电位 (AP) 传播速度的方法. 这种技术精确地识别了AP启动区,并量化了向前和向后传播速度.

科学领域:

神经科学是一个神经科学.
细胞电生理学细胞电生理学
轴轴运输轴轴运输轴轴运输轴轴运输

背景情况:

了解动作潜力 (AP) 传播对于神经元计算至关重要.
准确测量轴突中的AP速度对于这种理解至关重要.
现有的方法在识别启动区域和双向速度方面可能缺乏精度.

研究的目的:

介绍一项用于测量脑切片制备中的轴突中AP传播速度的协议.
精确确定AP启动区,量化前后传播速度.
为分析轴突电生理学提供一个强大的方法.

主要方法:

在大脑切片中使用联合体质全细胞和轴突松散贴片记录.
在直接的光学控制下,光染料填充的轴突是目标.
在多个位置分析体质AP和轴突作用电流的整体平均值.
将传播延迟与距离进行绘图,以确定启动区域并计算速度.

主要成果:

该协议成功地测量了从 soma 到多个轴突部位的 AP 传播延迟.
绘制延迟与距离的对比显示了基于最大延迟的AP启动区域.
延迟数据的线性拟合允许计算前向和后向AP传播速度.
总计500-600次扫描的平均值可以提高信号与噪声的比率,从而进行准确的测量.

结论:

这种双重记录方法提供了一种精确的方法来测量轴突中的AP传播速度.
该技术有效地识别了AP启动地点,并量化了双向传播速度.
该协议为研究神经元计算和轴突功能提供了有价值的工具.

关键词:

目前的行动当前的行动行动潜力行动潜力行动潜力背向传播是一种反向传播.这是一个松散的补丁.新皮质是新皮质的一个组成部分.传播速度的传播速度.金字塔神经元的神经元.触发区是一个触发区.整个细胞的记录记录.

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