The Cell as a RC Circuit
- Background:注:I是输入的电流,V是神经元膜相应的内外电压的变化情况(其变化与时间有关),这一变化就叫去极化
- RC circuit:注:R(resistance)C(capacitance)
The Voltage Equation for the Passive Cell
- The Equation:
- The Membrane Time Constant:注:R:The input resistence of the cell
Temporal Summation
The Resting Potential
- 注:在人脑内,electrode相当于synapses(输入电流)
The Synaptic Potential
- 为什么synapse是一个electical device?注:当神经递质与突触后神经元上的受体结合时,一些离子通道打开,产生current。
- The Synaptic Conductance(突触电导)
- Channels:注:1. x channels总是打开,是passive channels; 2. the red channels:当神经递质与受体相互作用时才打开
The Synaptic Battery
- gNa:
- gK:
- PSP:
The voltage Equation of the synapse and EPSP and IPSP
- EPSP:
- IPSP: