I. A mathematical model of a neuron

• Equivalent circuit model
  

• Parts of the circuit:

  • Power supplies: multiple to power different parts of the circuit to do different things
  • Integartor(积分器) of past inputs
  • Temporal filter to smooth inputs in time
  • Spike generator: the sodium current(钠通路) and potassium current(钾通路) make a spike generator that generates an action potential and then talks to another neurons.
  • Oscillator(振荡器)

• The wires of brain: The intracellular and extracelluar sapce is filled with salt solution.(细胞内液和细胞外溶液的电流)