Trigger control for detecting ERP based on tactile perception

Abstract

In these days, ERPs for auditory and visual stimuli have been developed. However, ERPs for tactile stimuli are still in the developmental stage. Compared with other sensory stimuli, it is difficult for tactile stimuli to match the “trigger timing” which means the time when subjects are given the stimuli, in the millisecond interval. Because of the gap in the ERP latency, the ERPs may cancel each other out during the arithmetic mean, which makes it difficult to detect the ERPs. Then we proposed a new method. We correlated the grand mean waveforms and controlled the latency of EPR to get the highest correlation. By aligning the latency of the ERPs, we could make it clearer to detect ERPs for tactile stimuli.