REM Sleep Theta Changes in Frequent Nightmare Recallers
SLEEP, August, 2017
Louis-Philippe Marquis; Tyna Paquette; Cloé Blanchette-Carrière; Gaëlle Dumel; Tore Nielsen
Study Objectives: To replicate and expand upon past research by evaluating sleep and wake electroencephalographic spectral activity in samples of frequent nightmare (NM) recallers and healthy controls.
Methods: Computation of spectral activity for sleep (non-REM and REM) and wake electroencephalogram recordings from 18 frequent NM recallers and 15 control participants.
Results: There was higher “slow-theta” (2–5 Hz) for NM recallers than for controls during wake, non-REM sleep and REM sleep. Differences were clearest for frontal and central derivations and for REM sleep cycles 2-4. There was also higher beta activity during NREM sleep for NM recallers. Findings partially replicate past research by demonstrating higher relative “slow-theta” (3-4Hz) for NM recallers than for controls.
Conclusions: Findings are consistent with a neurocognitive model of nightmares that stipulates cross-state anomalies in emotion processing in NM-prone individuals.