Review Article

Modeling Neural Activity

Figure 5

Example of an electronic circuit of an IF neuron model using analog components. The membrane is modeled by the R and C components (orange), the threshold is implemented by the OP-Amp as a comparator (the threshold is the value at the potentiometer, orange). The reset function is performed by the Reed relay. The diodes and 10 k resistors at the in-and output are included to rectify the signals. This model is linear for the subthreshold part of the activity. (b) shows a measurement of the subthreshold activity of the membrane including the reset at the threshold; (c) depicts a measurement of the spike output.
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