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皮层内突触潜力的调节通过突触前体内膜潜力的调节

Yousheng Shu¹, Andrea Hasenstaub, Alvaro Duque

¹Department of Neurobiology, Kavli Institute for Neuroscience, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA.

|April 21, 2006

概括

树突和 soma 中的突触活动不仅影响了动作潜力的发射,还影响了后突触潜力的幅度. 这揭示了皮层电路中混合的模拟和触发信号机制.

科学领域:

神经科学是一个神经科学.
细胞神经科学细胞神经科学
计算神经科学是一种神经科学.

背景情况:

神经元通信传统上涉及树突/体内突触潜能,其次是轴突中的动作潜能启动.
动能传播被认为是从 soma 到 postsynaptic 神经元的唯一快速信息传输机制.

研究的目的:

为了研究电压波动沿轴突的传播.
为了确定体质膜潜能如何调节轴突动力潜能和后突触潜能.

主要方法:

大脑皮层中的电生理记录.
对体膜潜力的操纵.
成像用于评估Ca2+依赖机制.

主要成果:

树突体突触活动的电压波动在轴突上显著传播.
实体膜电位变化调节轴突作用电位的幅度和持续时间.
一个依赖Ca2+的机制将人体活动与突触后潜能幅度联系起来.

结论:

树突和soma中的突触活动控制着动作潜能模式和突触潜能幅度.
皮层电路利用混合模拟和触发信号系统进行突触传输.

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