Interactive

Cortical Response Simulator

Drive the stimulus level, the residual EEG noise and the patient's arousal, and watch the N1–P2 grow, shrink and disappear — and the present/absent verdict follow. Every figure is hand-rolled SVG over a pure-math model; no recorded patient data.

Stimulus level above threshold40 dB SLResidual EEG noise1.2 µVPatient awake & alert

Response present

N1–P2 ≈ 7.9 µV · noise 1.2 µV · ratio 6.5

The shaded band is the residual-noise envelope. As you lower the level the N1–P2 shrinks and shifts later; as you raise the noise the response is swallowed — both push the verdict toward absent. Schematic.