Estimation of Visual ERP Signals with Nonextensive Entropy

Nonextensive entropy, the Tsallis-like time-dependent entropy (TDE), is developed to study the event-related potential signals ( ERPs ) in a cue, "E"-orientation discrimination task. The statistical characteristics of the TDE for different signal distributions are studied. Results indicated that with the appearance of P2 and N2, a significant decrease of TDE was correlated with the responses to small size cue which supports the previous theoretic analysis. This method provides a novel quantitative measurement for ERPs actives and may be a useful tool in signals monitoring.