The P300 (or P3) is an event-related potential (ERP) — an electrical response of the brain that occurs about 300 milliseconds after the presentation of a significant, novel, or expected stimulus. It reflects the brain's detection and processing of meaningful information.
Key Properties
- •Latency — ~300 ms after stimulus
- •Amplitude — stronger when stimulus is more salient or surprising
- •Location — maximal over parietal cortex
- •Function — attention allocation, context updating, decision-making
In ONDA Life
Part 7 lists "P300 Amplitude Increase" as a progress biomarker — indicating how quickly and efficiently the brain recognizes a significant stimulus. Higher P300 amplitude suggests improved signal-to-noise optimization and cognitive clarity.
Scientific Basis
Built on: Polyvagal Theory (Porges); Psychoneuroimmunology (Ader & Cohen); neuroplasticity research.