Linear and Nonlinear Quantitative EEG Analysis during Neutral Hypnosis following an Opened/Closed Eye Paradigm

Hypnotic susceptibility is a major factor influencing the study of neural correlates hypnosis using EEG. In this context, while its effects on response to hypnotic suggestions are undisputed, less attention has been paid “neutral hypnosis” (i.e., condition in absence suggestions). Furthermore, although an influence opened and closed eye onto hypnotizability reported, systematic investigation still missing. Here, we analyzed EEG signals from 34 healthy subjects with low (LS), medium (MS), (HS) power spectral measures TPSD, PSD) Lempel-Ziv-Complexity LZC, fLZC). Indeed, LZC was found be more suitable than other complexity for analysis, it never used hypnosis. Accordingly, each measure, investigated within-group differences between rest neutral hypnosis, opened-eye/closed-eye conditions under both Then, evaluated between-group experimental condition. We observed that, estimates did not reveal notable groups, fLZC were able distinguish HS, MS, LS. particular, left frontal difference HS LS during closed-eye rest. Moreover, symmetric pattern distinguishing Our results suggest that better capable discriminating different susceptibility, as compared standard analysis.