Information processing varies between insomnia types: measures of N1 and P2 during the night.
This study compared cortical arousal mechanisms during the night using event-related potentials (N1 and P2), and compared sleep misperception in 30 adults with psychophysiological insomnia (Psy-I), 28 adults with paradoxical insomnia (Para-I), and 30 good sleepers (GS). Participants (age range = 25-55 years) spent 4 consecutive nights in the laboratory, and Night-4 data were used for analysis. N1 amplitude was generally larger in both insomnia groups compared to GS, and P2 amplitude was larger in Para-I than in the 2 other groups, especially in REM sleep. Results suggest that, although hyperarousal appears to persist during sleep in adults with insomnia, inhibition deficits are more likely to be present in Para-I compared to Psy-I.
School of Psychology Laval University, Quebec, Canada. celyne.bastien@psy.ulaval.ca
Célyne H
CH
Bastien
Isabelle
I
Turcotte
Geneviève
G
St-Jean
Charles M
CM
Morin
Julie
J
Carrier
D000328:Adult; D001143:Arousal / Q000502:physiology*; D001294:Attitude to Health; D058256:Brain Waves / Q000502:physiology*; D016022:Case-Control Studies; D002540:Cerebral Cortex / Q000503:physiopathology; D005072:Evoked Potentials, Auditory / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D012720:Severity of Illness Index; D007319:Sleep Initiation and Maintenance Disorders / Q000145:classification* / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology