I. Papp

Nightmare disorder shows reduced slow oscillation-dominant spindle coupling in NREM sleep

npj Biological Timing and Sleep June 22, 2026 I. Papp, Zoran Cvetković, Nazanin Biabani et al.

Abstract Nightmare disorder is historically conceptualised as a rapid eye movement (REM) sleep parasomnia, but evidence also points to altered non-rapid eye movement (NREM) sleep physiology. Here, in a retrospective case-control study, we analysed overnight polysomnography from 26 adults with nightmare disorder and 32 controls using a harmonised event-based EEG pipeline. Nightmare disorder...