Lead placement

According to 10%-20% rule (Jasper 1958)

ERP creation method

Event Related Potentials are averaged waveforms as can be seen on the image above

ERP graphical representation

A typical ERP signal from lead Fp2 of a control subject (time in msec, voltage in μvolts)

ERP time intervals

Significant time intervals of the ERP waveform.

Thy are assumed to correspond with psychiatric notions.

Amplitudes & Latencies of the ERP

For each of the significant time intervals we calculate the amplitude (distance from x'x axis, i.e. voltage) and the latency (distance from y'y axis, i.e. time)

Mean ERP comparison

Comparing the mean ERPs of controls vs those of patients. It can be a helpful first step in the analysis.

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