Journal of Psychiatric Research
August 1, 2026
J. Maruani, E. Clerici, Michel Lejoyeux et al.
Nightmares are overrepresented in psychiatric disorders and are strongly associated with suicidality, especially in Major Depressive Episode (MDE). This study had two main objectives: (1) to determine an optimal diagnostic cutoff for the Nightmare Severity Index (NSI) to identify Nightmare Disorder (ND), and (2) to compare the clinical profiles of MDE patients with ND (MDE-ND) and without ND...
L'Encephale
June 1, 2026
Pierre A Geoffroy, Sammy Saadi, Sibylle Mauries et al.
Hyperonirism, or "epic dreaming," is an emerging clinical phenomenon characterized by excessive, vivid, and continuous dream activity associated with non-restorative sleep and daytime fatigue. Despite historical descriptions, it remains poorly defined and unrecognized by current nosological systems. We describe four patients assessed in expert sleep and psychiatry centers, presenting with...
International journal of clinical and health psychology : IJCHP
2026
Julia Maruani, Nathan Martins, Emmanuelle Clerici et al.
Nightmare Disorder characterized by recurrent dysphoric dreams is strongly associated with major depressive episodes (MDE) and suicidal risk. Imagery rehearsal therapy (IRT) is the standard treatment for nightmares, but its effectiveness in individuals with MDE remain understudied. This study evaluated whether IRT is associated with greater improvement in nightmare symptoms compared to sleep...
Brain and Behavior
February 28, 2025
Léa Dobler, Océane Richard, Emmanuelle Clerici et al.
2 citations
INTRODUCTION: Premenstrual syndrome (PMS) affects nearly half of women worldwide and is associated with sleep disturbances, though the specific relationship between PMS and nightmares remains underexplored. Clinical observations suggest a potential link, leading this study to investigate whether women with PMS experience more frequent or intense nightmares compared to those without PMS....
Journal of Sleep Research
May 1, 2024
Pierre A Geoffroy, Émilie Stern, Julia Maruani et al.
This psychometric pilot study aims to evaluate a new multidimensional simple scale, named the nightmare severity index (NSI) - close to the existing insomnia (ISI) and hypersomnia (HSI) severity indexes. The NSI encompasses all main dimensions of nightmare disorder, evaluating four subdimensions: frequency, emotional impact, diurnal impact, and nocturnal impact of nightmares. The NSI was...
Substance Use & Misuse
October 24, 2020
Balthazar Bazin, David Duroy, Michel Lejoyeux
27 citations
3,4-Methylenedioxy-N-methylamphetamine (MDMA) is increasing being used by youth in Europe and in France, but characteristics of its use are unknown. Objectives: The aim was to characterize MDMA use in a sample of French medical students. Methods: Cross-sectional study of Paris VII medical students (N = 592) with an online self-reporting questionnaire. Results: 592 students completed the online...