The Model Neuron Structure and Equations

The voltage-dependent currents are calculated by the following equations (i = Na, K, Na,p, K,Ca)  

Exceptions are (a) instantaneous activation of the fast depolarizing current and (b) direct coupling of the slow repolarizing current to the slow depolarizing current according to  

Gaussian white noise is implemented according to the Box-Mueller algorithm [101]. Ic is the coupling current in network simulations which accounts for electrotonic gap-junction connections between the neurons. For bidirectional coupling of two neurons the coupling current Ic are of the form [94]  

For nearest neighbor coupling in bigger networks of, for example, ten by ten neurons the coupling current fc(i,j) of a neuron at position (i,j) is the sum of input currents from the neighboring neurons  

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