Increased Evoked Potentials to Arousing Auditory Stimuli during Sleep: Implication for the Understanding of Dream Recall.
Frontiers in Human Neuroscience January 1, 2017 Raphael Vallat, Tarek Lajnef, Jean-Baptiste Eichenlaub et al.
People who frequently recall their dreams show larger brain responses to sounds while awake and asleep and spend more time awake during the night, but their overall sleep structure is similar to that of low dream recallers. In a study of 18 high and 18 low dream recallers, sounds were played during a full night of sleep while brain activity was recorded. No differences in sleep microstructure—such as arousals, eye movements, or muscle twitches—were found between the groups. High recallers had more stimuli that caused awakenings and longer awakenings, but not more frequent or longer arousals.