Posttraumatic Nightmare Research Articles

Nightmares and Sleep Disturbances in Children with PTSD: A Polysomnographic and Actigraphy Approach Evaluation.

Sleep disturbances (insomnia and nightmare symptoms) are the most sensitive and persistent symptoms of pediatric post-traumatic stress disorder (PTSD). Untreated, these sleep disturbances (SD) associated with PTSD are predictive of PTSD persistence and increased psychiatric complications. The aim of this study was to evaluate sleep and circadian rhythms in children with PTSD under both laboratory and ecological conditions in comparison with a control population and to test for the first time the hypothesis that SD and circadian rhythms are positively correlated with PTSD severity and its comorbidities. This prospective pilot study evaluated PTSD, SD (insomnia, nightmares), and sleep-wake rhythms in 11 children with PTSD (aged 3-18), compared with the age and sex-matched control groups. Assessment of PTSD and subjective and objective measures of sleep and sleep-wake rhythms (questionnaires, 24-h in-laboratory video-polysomnography, 15-day at-home actigraphy recording) were performed between 1 and 6 months after the traumatic event. Children with PTSD had higher sleep fragmentation (increased wake-after-sleep onset, increased number of sleep stage changes) compared to controls, with a change in sleep microarchitecture (micro-arousal index at 14.8 versus 8.2, p = 0.039). Sleep fragmentation parameters correlated with PTSD symptomatology, insomnia, and post-traumatic nightmare severity. The within-group comparison revealed a better sleep architecture in the controlled (sleep laboratory) than in the ecological condition (at home) (total sleep time 586 versus 464 min, p = 0.018). Sleep and rhythm disturbances are strongly associated with PTSD in children. The assessment of SD in children with PTSD should be carried out systematically and preferentially under ecological conditions, and management of SD should integrate the environment (environmental design, psycho-education for the children and their parents) more fully into therapy focused on sleep and trauma.

Gender differences in nightmare characteristics following trauma

Gender is one of the well-recognized risk factors for idiopathic nightmares, but rarely connected to posttraumatic nightmare characteristics. Thus, this study aims to test gender differences in (posttraumatic) nightmare characteristics after controlling for trauma-related psychopathology in a large sample of people who experienced trauma. Research participants were 707 soldiers (mean age 31.3 years, 19.5% women) admitted to a hospital-based treatment program for veterans who completed extensive assessments consisting of clinical interviews and self-rating measures with respect to socio-demographic characteristics and psychopathology, as well as dream-related variables. Results indicate no gender differences with respect to nightmare frequency, psychophysical and emotional involvement, reorientation, and dream recall after awakening. Differences between men and women in the amount of replicative content are fully, and in case of nightmare related impairment, explained mainly by the presence of PTSD diagnosis, nightmare frequency, and age. This study questions the significance of gender as a risk factor or predictor of specific (posttraumatic) nightmare characteristics in traumatized and military samples. Further research needs to test if our findings are restricted to military contexts or can be generalized to civilian samples.

1070 An Examination of the Relationship Between Language Use in Post-Trauma Nightmares and Psychological Sequelae in a Treatment Seeking Population

Abstract Introduction Studying language use in dreams and nightmares has become an increasingly used tool to understand underlying emotional and cognitive processes. Specifically, in regards to post-trauma nightmares (PTNMs), nightmare transcriptions can offer a lens to understand a survivor’s interpretation of their trauma. The current study will utilize a method of quantitative text analysis to analyze the relationship between specific psychological constructs and symptoms of posttraumatic stress disorder (PTSD) and nightmare qualities. It is hypothesized that there will be a positive correlation between words related to perceptual processes and negative emotions in nightmares and PTSD symptom and nightmare severity. There will be a negative correlation between cognitive processes and positive emotion words, and PTSD symptom and nightmare severity. Methods Fifty-three nightmares were collected from participants that were recruited from the community in a Midwestern city as part of an ongoing investigation of the effectiveness of a brief cognitive-behavioral intervention for PTNM, Exposure, Relaxation, and Rescripting Therapy (ERRT). All participants were over the age of 18, have experienced a criterion A trauma, and have nightmares at least once weekly. Linguistic Inquiry and Word Count (LIWC) was utilized to analyze the nightmare transcriptions. The Posttraumatic Stress Disorder Checklist for the DSM-5 (PCL-5) and the Trauma-related Nightmare Survey (TRNS) were used to measure symptom severity. A Pearson’s correlation analysis was used for this exploratory study. Results Words related to perceptual processes were significantly positively correlated with PTSD symptom and nightmare severity (p<.05) Neither negative nor positive emotion words were significantly related to PTSD and nightmare symptoms (p>.05). Cognitive processing words were significantly negatively correlated with PTSD and nightmare symptoms (p<.05). Conclusion The results of this study support the hypothesis that language use in nightmares reveals important information about underlying cognitive and emotional functioning. The results of this study may have an important impact on treatment considerations for those who have experienced trauma. Analyzing language use in PTNM may help to understand the etiology and maintenance of PTSD symptoms. Support Support for this study comes from the University of Tulsa Institute of Trauma, Adversity, and Injustice.

1063 Depression Moderates the Association Between Posttraumatic Stress Disorder and Nightmare Severity in Nurses

Abstract Introduction Nurses report a higher prevalence of posttraumatic stress disorder (PTSD) than the general population, and approximately 18% of nurses report having depression. Nightmares are a common symptom of PTSD, and both nightmares and PTSD are correlated with depression. Nightmares may represent a possible clinical target for improving outcomes in both disorders. This study assessed associations between PTSD and depressive symptoms with nightmare severity, and whether depressive symptoms moderated associations between PTSD and nightmare severity. Methods Participants were 461 nurses (91% female; 77% white, mean age = 38.39 years) recruited from two hospitals for a parent study. Participants completed the Patient Health Questionnaire (PHQ-9), Post-traumatic Stress Disorder Checklist (PCL-5), and 14 days of sleep diaries to assess daily nightmare frequency and severity (on a scale of 0 = not at all severe to 3 = very severe). Results 22.1% of participants reported at least one nightmare across the 14 days, with a mean daily nightmare frequency of 1.17 (SD = 2.15) and a mean severity of 0.11 (SD = 0.18). PCL-5 and PHQ-9 scores were significantly correlated with nightmare severity (r = 0.27; r = 0.24, respectively) and each other (r = 0.69). PHQ-9 scores moderated the association between PCL-5 scores and nightmare severity (β = -.01, SE = <0.01, p = 0.015). For individuals 1 SD below the PHQ-9 mean, higher PCL-5 scores were associated with higher nightmare severity. For individuals 1 SD above the PHQ-9 mean, higher PCL-5 scores were associated with higher nightmare severity, but to a lesser degree. Conclusion Both depressive and PTSD symptoms were associated with more severe nightmares. Surprisingly, the association between PTSD symptoms and nightmare severity was stronger for those with lower depressive symptoms. Results suggest depression, PTSD, and nightmares may represent a partially overlapping symptom cluster. Research should investigate how nightmare treatment may reduce PTSD and depressive symptoms. Support NIAID R01AI128359-01

Book review: Dreams, Vietnam and Other Dreams, by Marc Levy

The former infantry medic Marc Levy published his dream reports, which he was recording regularly for one year, 45 years after he returned from Vietnam War. After the war, he was suffering from severe nightmares related to war experiences. Those dreams are also published in another book. In his newer dreams, war themes are less frequently occurring. They mostly represent daily concerns, and severe threatening dream themes are occurring rarely, but war themes are still reported. In some dreams, severe conflicts are escalating between the dream-self and other dream characters, where the dream-self is also physically violent. This books offer future research a possibility to compare dream contents of idiopathic and posttraumatic nightmare dreamers over a long time period.

Posttraumatic Nightmare Content in Children and its Relation to Posttraumatic Psychopathology

In adult populations, the more similar a posttraumatic nightmare is to a precipitating traumatic event, i.e., the replicativeness of the nightmare, the more distress one experiences, and the greater the frequency and severity of posttraumatic stress symptoms. Posttraumatic nightmare content in children and its relation to posttraumatic psychopathology remains unclear. Nightmare content and trauma-related themes within children’s posttraumatic nightmares remains relatively unexplored. Trauma-exposed children (n = 17) aged 5-17 years-old provided a posttraumatic nightmare narrative and answered questions about the replicativeness of their posttraumatic nightmare. Nightmare content and trauma-related themes were coded. Two one-way ANOVAs examined posttraumatic nightmare replicativeness to levels of posttraumatic stress and to nightmare distress. Findings showed that in children, posttraumatic nightmare replicativeness was associated with posttraumatic stress but not nightmare distress. The most common trauma-related themes in posttraumatic nightmares were safety and power/control. Girls’ nightmares more often contained pursuit and perceived threat whereas boys’ nightmares more often involved aggression. Our study is the first to examine trauma-related themes and qualitative aspects of posttraumatic nightmares in children with a variety of traumas. Future studies should examine gender differences and trauma-related themes, as these may have implications for our understanding and treatment of nightmares in children.

Efficacy of imagery rescripting and imaginal exposure for nightmares: A randomized wait-list controlled trial

Nightmares can be effectively treated with cognitive-behavioral therapies. Though it remains elusive which therapeutic elements are responsible for the beneficial effects on nightmare symptoms, imagery rescripting (IR) and imaginal exposure (IE) are commonly identified as active treatment components of nightmare therapies. With this randomized controlled trial, we compared IR and IE as individual treatments to a wait-list (WL) condition to determine whether these particular therapeutic elements ameliorate nightmare symptoms. For this purpose, 104 patients with a primary DSM-5 diagnosis of nightmare disorder were randomly assigned to three weekly individual sessions of either IR or IE, or WL. Results showed that compared to WL, both interventions effectively reduced nightmare frequency (ΔdIR-WL = 0.74; ΔdIE-WL = 0.70) and distress (ΔdIR-WL = 0.98; ΔdIE-WL = 1.35) in a sample that predominantly consisted of idiopathic nightmare sufferers. The effects of IR and IE were comparable to those observed for other psychological nightmare treatments. Initial effects at post-treatment were sustained at 3- and 6-months follow-up, indicating that IR and IE both seem to be efficacious treatment components of nightmare therapies. Additional research is needed to directly compare IR and IE among both idiographic and posttraumatic nightmare sufferers with respect to treatment expectancy, acceptability, and effectiveness.

Sleep pathophysiology in posttraumatic stress disorder and idiopathic nightmare sufferers

Background Nightmares are common in posttraumatic stress disorder (PTSD), but they also frequently occur in idiopathic form. Findings associated with sleep disturbances in these two groups have been inconsistent, and sparse for idiopathic nightmares. The aim of the present study was to investigate whether sleep anomalies in PTSD sufferers with frequent nightmares (P-NM) differ from those observed in non-PTSD, idiopathic nightmare (I-NM) sufferers and healthy individuals. Methods Sleep measures were obtained from nine P-NM sufferers, 11 I-NM sufferers, and 13 healthy control subjects. All participants slept in the laboratory for two consecutive nights where electroencephalogram, electro-oculogram, chin and leg electromyogram, electrocardiogram, and respiration were recorded continuously. Results Posttraumatic nightmare sufferers had significantly more nocturnal awakenings than did I-NM sufferers and control subjects. Elevated indices of periodic leg movements (PLMs) during rapid eye movement (REM) and non-REM sleep characterized both P-NM and I-NM sufferers. Conclusions Posttraumatic nightmare sufferers exhibit more nocturnal awakenings than do I-NM sufferers and control subjects, which supports the hypothesis of hyperarousal in sleep in PTSD sufferers; however, elevated PLM indices in both P-NM and I-NM sufferers suggest that PLMs may not be a marker of hyperarousal in sleep of PTSD sufferers. Rather, PLMs may be a correlate of processes contributing to intense negative dreaming.

Intrusive re-experiencing of chronic strife or war

The most important psychiatric implication of experiencing trauma during war is post-traumatic stress disorder (PTSD). The core symptoms of PTSD are intrusive re-experiencing of traumatic events, hyperarousal in reaction to minor stimuli and avoidance of trauma-related triggers. In this paper we describe the phenomenon of intrusive reexperiencing, of which the post-traumatic nightmare (PTNM) is an impressive manifestation that causes considerable distress (Mellman et al, 1995; Schreuder, 1996; Ørner & de Loos, 1998; Schreuder et al, 1998).