Further investigation is needed to fully understand brain mechanisms underlying NM production and especially how such mechanisms are present in a variety of psychiatric populations. Future studies could use other EEG measures (coherence analyses), more sophisticated tools (high-density EEG with enables source localization), or experimental procedures (REM deprivation, nap paradigms) to uncover these mechanisms.
Dream reports could also be used to link subjective experiences (clarity of dream recall, negative emotions, distress) to EEG activity, especially to theta power or coherence. This could provide much needed insight into the possible emotion-processing functions of REM sleep.
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