Audio P300 Voltage/Delay
The EEG Audio P300 is an event-related potential (ERP) that provides temporally accurate data of brain performance and reactiveness through a subconscious measure of attention and memory that measures the brain’s speed (roughly 300 milliseconds) in recognizing an odd (high) tone and the quality or power of this recognition.
The amplitude (µV) is considered proportional to the strength and power of the number of attentional resources devoted to recognizing the tone, and the latency (ms) is a measure of classification speed and how quickly the tone was recognized. Although the P300 is a positive voltage change occurring approximately 300 milliseconds after the rare tone is delivered, by convention it is displayed in an inverted form as a downward moving voltage.
An increase in latency and/or a decrease in amplitude has been observed in various conditions associated with reduced cognitive function, including aging, dementia, depressive disorders, trauma, and vascular issues. Studies find that the P300 voltage and physical reaction time correlate with symptomatic concussive events. Additionally, follow your brain health longitudinally as baseline reports can be viewed against those over various points in the healing process where the P300 voltage often normalized to baseline after symptom resolution. Clinicians use this non-specific P300 measurement to investigate interventions that increase the amplitude and/or decrease latency, others use P300 as a basis for patient tracking.
The Audio P300 research has shown that an increase in latency and/or a decrease in amplitude has been observed in various conditions associated with brain trauma and memory loss.