The traumatized body: Long-term PTSD and its implications for the orientation towards bodily signals

Self-reported bruxism in patients with post-traumatic stress disorder

OBJECTIVE

The present study aimed to investigate the association between self-reported awake/sleep bruxism, and orofacial pain with post-traumatic stress disorder (PTSD).

METHODS

A case-control study with a convenience sample was designed. Participants were recruited from a university-based Trauma Ambulatory. The diagnosis of PTSD was established through a clinical interview and the Structured Clinical Interview (SCID-I/P). Thirty-eight PTSD patients and 38 controls completed the Research Diagnostic Criteria for Temporomandibular Disorders Axis-II to categorize awake/sleep bruxism and orofacial pain. Following this, we performed a short clinical examination of the temporomandibular joint and extraoral muscles.

RESULTS

Adjusted logistic regression analysis showed that awake bruxism was associated with PTSD (OR = 3.38, 95% CI = 1.01-11.27, p = 0.047). Sleep bruxism was not associated with any covariate included in the model. In a Poisson regression model, PTSD (IRR = 3.01, 95% CI = 1.38-6.55, p = 0.005) and the muscle pain/discomfort (IRR = 5.12, 95% CI = 2.80-9.36, p < 0.001) were significant predictors for current orofacial pain.

CONCLUSIONS

PTSD was associated with self-reported awake bruxism and low-intensity orofacial pain. These conditions were frequent outcomes in patients previously exposed to traumatic events.

CLINICAL RELEVANCE

We suggest including a two-question screening for bruxism in psychiatry/psychology interviews to improve under-identification and to prevent harmful consequences at the orofacial level.

Long-lasting effects of World War II trauma on PTSD symptoms and embodiment levels in a national sample of Poles

The main aim of this study was to investigate the long-lasting influences of World War II (WWII) trauma in a national sample of Poles, based on Danieli's (1998) survivors' post-trauma adaptational styles (fighter, numb, victim) and their link with current post-traumatic stress disorder (PTSD) symptoms and embodiment level among participants. We also sought to investigate whether the level of knowledge about WWII trauma among ancestors could moderate that association. The study was conducted among a representative sample of 1598 adult Poles obtained from an external company. Participants filled out the Danieli Inventory of Multigenerational Legacies of Trauma, the knowledge about traumatic World War II experiences in the family questionnaire, the Posttraumatic Diagnostic Scale-5, and the Experience of Embodiment Scale. We observed a positive relationship between all survivors' post-trauma adaptational styles and current levels of PTSD symptoms among participants. In addition, PTSD level mediated the relationships between those adaptational styles and embodiment intensity; that mediation was additionally moderated by a lack of knowledge about WWII trauma among ancestors in our participants. Our study adds to the literature on intergenerational trauma by highlighting the importance of evaluating embodiment in understanding the mechanisms of trauma transmission. Furthermore, it highlights the moderating effect of knowledge of family history in this mechanism and the need to share family histories with subsequent generations.

Exposure to combat experiences: PTSD, somatization and aggression amongst combat and non-combat veterans

To this date, the prevalence of posttraumatic stress disorder (PTSD) and associated psychological symptom profiles amongst non-combatant community-based veterans in Israel has not been studied. Data were analysed from a web-based survey of veterans via a market research platform during September 2021 and included 522 non-combat (e.g. intelligence, office-based or education corps) veterans and 534 combat (e.g. front-line infantry) veterans. The survey assessed PTSD, depression, anxiety and somatic symptoms in addition to the prevalence of self-reported aggression. A two-way multivariate analysis of covariance indicated that higher PTSD and somatic symptoms were prevalent for those exposed to combat experiences even when not in a combatant role. A logistic regression indicated that of those who did not self-define as aggressive prior to service, those exposed to combat were three times more likely to be aggressive following their service than veterans not exposed to combat. This effect was not demonstrated for combat soldiers compared to non-combat soldiers. Results indicate that mental health outreach would be better targeted towards those who have been exposed to combat-type experiences during their service even in non-combat units. The current study highlights the effect of combat exposure on secondary PTSD symptoms; aggression and somatization.

Trauma-related disorders and the bodily self: current perspectives and future directions

Trauma-related disorders are debilitating psychiatric conditions that influence people who have directly or indirectly witnessed adversities. Dramatic brain/body transformations and altered person's relationship with self, others, and the world occur when experiencing multiple types of traumas. In turn, these unfortunate modifications may contribute to predisposition to trauma-related vulnerability conditions, such as externalizing (aggression, delinquency, and conduct disorders) problems. This mini-review analyzes the relations between traumatic experiences (encoded as implicit and embodied procedural memories) and bodily self, sense of safety for the own body, and relationship with others, also in the presence of externalizing conducts. Furthermore, an emerging research area is also considered, highlighting principles and techniques of body-oriented and sensorimotor therapies designed to remodel bodily self-aspects in the presence of trauma, discussing their potential application with individuals showing externalizing problems.

Altered Resting-State functional connectivity in the anterior and posterior hippocampus in Post-traumatic stress disorder: The central role of the anterior hippocampus

BACKGROUND

Post-traumatic stress disorder can be viewed as a memory disorder, with trauma-related flashbacks being a core symptom. Given the central role of the hippocampus in autobiographical memory, surprisingly, there is mixed evidence concerning altered hippocampal functional connectivity in PTSD. We shed light on this discrepancy by considering the distinct roles of the anterior versus posterior hippocampus and examine how this distinction may map onto whole-brain resting-state functional connectivity patterns among those with and without PTSD.

METHODS

We first assessed whole-brain between-group differences in the functional connectivity profiles of the anterior and posterior hippocampus within a publicly available data set of resting-state fMRI data from 31 male Vietnam war veterans diagnosed with PTSD (mean age = 67.6 years, sd = 2.3) and 29 age-matched combat-exposed male controls (age = 69.1 years, sd = 3.5). Next, the connectivity patterns of each subject within the PTSD group were correlated with their PTSD symptom scores. Finally, the between-group differences in whole-brain functional connectivity profiles discovered for the anterior and posterior hippocampal seeds were used to prescribe post-hoc ROIs, which were then used to perform ROI-to-ROI functional connectivity and graph-theoretic analyses.

RESULTS

The PTSD group showed increased functional connectivity of the anterior hippocampus with affective brain regions (anterior/posterior insula, orbitofrontal cortex, temporal pole) and decreased functional connectivity of the anterior/posterior hippocampus with regions involved in processing bodily self-consciousness (supramarginal gyrus). Notably, decreased anterior hippocampus connectivity with the posterior cingulate cortex/precuneus was associated with increased PTSD symptom severity. The left anterior hippocampus also emerged as a central locus of abnormal functional connectivity, with graph-theoretic measures suggestive of a more central hub-like role for this region in those with PTSD compared to trauma-exposed controls.

CONCLUSIONS

Our results highlight that the anterior hippocampus plays a critical role in the neurocircuitry underlying PTSD and underscore the importance of the differential roles of hippocampal sub-regions in serving as biomarkers of PTSD. Future studies should investigate whether the differential patterns of functional connectivity stemming from hippocampal sub-regions is observed in PTSD populations other than older war veterans.

Post-Traumatic Orientation to Bodily Signals: A Systematic Literature Review

Theoretical literature suggests that trauma and (PTSD) may instigate changes in the interpretation of bodily signals. Some findings support these inquiries, revealing that exposure to traumatic events and PTSD are associated with pain catastrophizing, body vigilance, fear of pain, and other manifestations of bodily perceptions and interpretations. However, these findings are not integrated into an inclusive empirically based conceptualization, thus leading to a limited comprehension of this phenomenon. This systematic literature review was conducted to synthesize the existing literature referring to orientation to bodily signals. Using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, the review included a final of 48 manuscripts that addressed orientation to bodily signals among participants (aged 18 and above) and its potential associations with PTSD. The review revealed that most studies assessed one orientation manifestation, which was tested for its link to PTSD. The majority of the manuscripts were cross-sectional and included participants who faced combat, vehicle accidents, or various types of traumas. Only five manuscripts focused on interpersonal trauma and abuse. Most manuscripts reported significant correlations, revealing that trauma and PTSD are associated with a negative, catastrophic and frightful interpretation of bodily signals. These findings emphasize the need to encapsulate the various manifestations of orientation to bodily signals under a unified construct, as proposed by the term post-traumatic orientation to bodily signals. Further research is needed to illuminate the circumstances and processes by which trauma is implicated in post-traumatic orientation to bodily signals.

Loneliness and psychosocial predictors of psychosis-proneness during COVID-19: Preliminary findings from Croatia

The present study investigated psychosocial predictors of psychosis-risk, depression, anxiety, and stress in Croatia during the COVID-19 pandemic. Given Croatia's recent transgenerational war trauma and the relative lack of available prodromal data, this study presents a unique opportunity to examine the impact of loneliness and other psychosocial factors on psychosis-risk and mental health in this population. 404 Croatian participants completed an anonymous online survey of physical and mental health questions. 48 participants met the criteria for elevated psychosis-risk on prodromal questionnaire (PQ-16). Loneliness had a significant impact on psychosis-risk. Exposure to trauma was associated with psychosis-risk and loneliness, while domestic abuse/violence was associated only with the distress surrounding psychotic-like symptoms. COVID concern was also associated with psychosis-risk. Lastly, the associations between psychosis-risk and depression, anxiety, and stress were robust. These findings highlight the important role of loneliness in psychosis-proneness in Croatia. Depression, anxiety, and stress were also closely related to elevated psychosis-risk. Loneliness is a highly salient issue for individuals with psychosis and it is important to target loneliness within a multi-faceted psychosocial intervention for those at risk for schizophrenia.

Development and Psychometric Evaluation of the Reactions to Somatic Stress Questionnaire (RSSQ)

Abstract. Background: Stress is a ubiquitous phenomenon in modern societies and is often accompanied by somatic sensations and symptoms, such as tension and nausea. Despite the inherent somatic component of stress, research on coping with stress has previously neglected to consider how somatic stress responses (i.e., somatic stress) may affect stress-coping behavior. Aim: To address this gap in the literature, this study introduces the concept of reactions to somatic stress (RSS). It also provides the first psychometric evaluation of the Reactions to Somatic Stress Questionnaire (RSSQ), a novel 16-item questionnaire that assesses hampering and facilitating RSS. Method: The RSSQ and a battery of questionnaires on related constructs were administered via an online survey to N = 265 participants from the general population. Results: Exploratory ( n = 133) and confirmatory ( n = 132) factor analyses yielded two dimensions of the RSSQ: Hampering RSS (RSS-H) and facilitating RSS (RSS-F). Both subscales showed good internal consistency (α = .81–.89). Correlations with body awareness, emotion regulation skills, and beliefs about stress indicated medium to high convergent and discriminant validity. The RSS-H and RSS-F scores significantly predicted maladaptive and adaptive coping behavior, respectively. This association remained stable after controlling for subjective stress and related measures. Limitations: Generalization of the obtained results is limited to healthy individuals. Conclusion: The study supports the theoretical assumptions underlying the RSS concept. The RSSQ suggests a promising way to assess reactions to somatic stress as they relate to coping with stress. The RSSQ could be used for clinical and health psychological testing or interdisciplinary research.

Peritraumatic Pain in Child Sexual Abuse: Children's Descriptions of Pain as Conveyed in Their Testimonies Following Child Sexual Abuse

The literature on child sexual abuse (CSA) has contributed significantly to the understanding of its characteristics, epidemiology, and consequences. Considerably less attention has been dedicated, however, to the subjective experiences of the abused children, and more specifically to their experiences of pain. The current study explored the way children perceive and describe pain during and shortly following incidents of sexual abuse. The sample was comprised of 35 transcripts of forensic interviews following alleged CSA. Thematic analysis of the children's narratives identified three themes: (a) pain during the abusive incidents, described using words indicating its intensity and quality; (b) pain shortly after the abusive incidents, including weeks later, and (c) pain as embedded within the complex dynamic with perpetrator. The children struggled to localize the pain, mainly using words such as "inside" and "deep." Moreover, they testified that in the course of the abusive incidents, they were often silenced when trying to communicate their pain to the perpetrators. The children's narratives provided us with a unique opportunity to learn about the pain not only during the abusive incidents but also following it. Additionally, children described suffering from pain in areas that were not directly injured during the CSA incidents, mainly referring to the head, abdomen and legs. The discussion addresses the potential intervening factors in peritraumatic CSA pain, as well as its potential links with chronic post-traumatic physical and mental morbidity. This study illuminates the necessity to address the complicated links between short- and long-term physical, emotional, cognitive, and interpersonal manifestations of CSA.

Chronic Pain Personification Following Child Abuse: The Imprinted Experience of Child Abuse in Later Chronic Pain

Child abuse has been shown to increase the risk for chronic pain. The illness personification theory implies that individuals tend to ascribe humanlike characteristics to chronic pain, and that this personification is embedded in the way they cope with their chronic condition. Recent findings demonstrate that individuals who experienced interpersonal violence tend to personify chronic pain in a way that resonates with past abusive experience. Although findings prevail to the link between trauma and the experience of the body, the personification of chronic pain among individuals who experienced child abuse has not been examined before. This article includes two studies that tested whether child abuse is implicated in abusive chronic pain personification in a young adult female sample (Study 1) and among females who experienced child abuse (Study 2). In both studies, self-report measures of child abuse, posttraumatic stress (PTS) symptoms, complex posttraumatic symptoms (disturbances of self-organization [DSO]), and abusive chronic pain personification were administered. Structural equation modeling was utilized to assess the hypotheses. The findings of the two studies showed a significant association between child abuse and pain personification. Whereas PTS symptoms did not mediate this link (Study 1), DSO symptoms mediated this association (Study 2). The findings of these studies support the understanding that the experience of interpersonal violence is engraved in the experience of the body, as reflected in abusive chronic pain personification. Disturbances in self-organization seem to underlie this process, thus pertaining to the link between the experience of the body, self, and interpersonal trauma.

Neuroscientific evidence for pain being a classically conditioned response to trauma- and pain-related cues in humans

ABSTRACT

Psychological trauma is typically accompanied by physical pain, and posttraumatic stress disorder (PTSD) often co-occurs with chronic pain. Clinical reports suggest that pain after trauma may be part of a re-experiencing symptomatology. Classical conditioning can underlie visual re-experiencing since intrusions can occur as conditioned responses (CRs) to trauma-related cues. If individuals also experience pain to cues previously paired with, but not anymore inflicting nociceptive stimulation (CSs), conditioning could also explain re-experiencing of pain. Sixty-five participants underwent classical conditioning, where painful electrocutaneous stimulation and aversive film-clips served as unconditioned stimuli (USs) in a 2(pain/no pain)×2(aversive/neutral film) design. CSs were neutral pictures depicting contextual details from the films. One day later, participants were re-exposed to CSs during a memory-triggering-task (MTT). We assessed pain-CRs by self-report and an fMRI-based marker of nociceptive pain, the neurologic pain signature (NPS); and recorded spontaneous daily-life pain-intrusions with an e-diary. During conditioning, pain-signaling CSs elicited more self-reported-pain and NPS-responses than no-pain-signaling CSs. Possibly because the aversive-film masked differences in participants' responses to pain-signaling vs. no-pain-signaling CSs, pain-CRs during acquisition only emerged within the neutral-film condition. When participants were re-exposed to CSs during MTT, self-reported-pain-CRs during the neutral-film condition and, though more uncertain, NPS-CRs during the aversive-film condition persisted. Importantly, participants with stronger pain-CRs showed a greater probability and severity of experiencing spontaneous pain intrusions during daily-life. Our data support that pain can emerge as a CR with emotional and sensory components. Classical conditioning presents a possible mechanism explaining pain-intrusions, and more broadly, pain experienced without nociceptive input.

Connection between the COVID-19 pandemic, war trauma reminders, perceived stress, loneliness, and PTSD in Bosnia and Herzegovina

In order to gain a better understanding of what happens during the COVID-19 pandemic to those who were previously traumatized, this study investigated perceived stress and severity of PTSD symptoms during the COVID-19 pandemic in people who experienced the 1992-1995 war in Bosnia and Herzegovina. It was also examined how reminders of past trauma and loneliness instigated by the COVID-19 crisis relate to current stress and PTSD symptoms. The sample consisted of 123 participants (74.8% women). Participants responded to assessments of sociodemographic characteristics, exposure to COVID-related information, concerns over disease, severity of exposure to war, frequency and intensity of war trauma reminders, loneliness, stress, and severity of PTSD symptoms. Data was collected as part of the COVIDiSTRESS Global Survey. Results showed that in a population previously exposed to the effects of war, severity of PTSD symptoms was positively related to perceived stress, and loneliness during the pandemic significantly mediated this relationship. Intensity of exposure to war trauma reminders was associated with higher levels of PTSD symptom severity. Higher severity of PTSD symptoms was related to forced displacement during the war. Moreover, higher stress was related to increased concerns over disease. To conclude, those exposed to war may be more affected by the global COVID-19 pandemic and preventive measures that accompany it, while loneliness mediates the effects of PTSD and perceived stress in this population.

Strategies for Managing Chronic Pain, Chronic PTSD, and Comorbidities: Reflections on a Case Study Documented over Ten Years

Chronic pain and chronic PTSD are often comorbid sequelae in patients who have experienced life-threatening experiences such as combat, assaults, or motor vehicle accidents, presenting lifelong challenges for patients and for medical management in all settings. This article briefly reviews four models for exploring the interrelationships of chronic pain and chronic PTSD. The article presents a longitudinal case study, documented over 10 years, of a patient with chronic back pain, and delayed-onset chronic PTSD related to sexual trauma experienced as a young adult. Data from the case study are examined for evidence in support of the chronic pain/chronic PTSD models. There is evidence to support all four models, with considerable evidence supporting the Mutual Maintenance Model (Sharp & Harvey, in Clinical Psychology Review 21(6): 857-77, 2001). Data show significant recovery over time from both conditions with improvements in function, work, and relationships, in response to Psychodynamic Therapy (PDT), Cognitive Behavioral Therapy (CBT), and hypnotic interventions, physical therapy, and pilates-based exercise. Notably, both chronic conditions were addressed simultaneously, with providers working collaboratively and sharing information through the patient. Emphasis is on non-pharmaceutical rehabilitative trauma-informed and patient-centered approaches to care.

Fear of pain as a predictor of concurrent and downstream PTSD symptoms

BACKGROUND

Pain anxiety has been associated with more severe posttraumatic stress disorder (PTSD) symptoms. However, the unique role of individual domains of pain anxiety has yet to be explored in the prediction of PTSD severity. This study examined whether specific pain anxiety domains (i.e., cognitive anxiety, escape/avoidance, fear of pain, and physiological anxiety) predict both concurrent and downstream PTSD symptoms above and beyond other PTSD risk factors.

METHOD

Participants were 63 survivors of traumatic events with moderate to high baseline pain treated in the emergency department and assessed for PTSD symptoms and pain anxiety at 3- and 12-months.

RESULTS

Three-month pain anxiety domains of fear of pain and physiological anxiety (inversely related) significantly predicted concurrent 3-month PTSD symptoms above and beyond other established PTSD risk factors (i.e., sex, age, pain, and trauma type). However, only 3-month fear of pain significantly predicted 12-month PTSD symptoms.

CONCLUSIONS

Findings highlight the relevance of specific pain anxiety domains in concurrent and future PTSD symptoms and suggest the importance of evaluating pain anxiety among patients with PTSD. Interventions focused on increasing willingness to experience and tolerate fear of pain may help mitigate this risk, thereby improving outcomes for individuals with acute PTSD symptoms.

COVID-19-related fear and stress among individuals who experienced child abuse: The mediating effect of complex posttraumatic stress disorder

BACKGROUND

The COVID-19 pandemic exposes individuals not only to health-related risks, but also to psychosocial fear and acute stress. Previous studies reveal that individuals who experienced child abuse (CA), especially those who suffer from complex posttraumatic stress disorder (CPTSD), are at a higher risk of reacting with fear and stress when faced with stressful life-events.

OBJECTIVE

To test whether exposure to CA is implicated in a higher risk of COVID-19-related fear and acute stress, and whether CPTSD intervenes in such processes.

PARTICIPANTS AND SETTINGS

A convenience sample of 837 adults participated in the study during the first peak of COVID-19 in Israel.

METHODS

Participants completed self-report questionnaires, assessing child physical, sexual and emotional abuse, CPTSD (ITQ), COVID-19-related acute stress disorder (COVID-19 ASD; ASDS) and fear of COVID-19.

RESULTS

Bivariate analyses showed that participants who experienced CA were higher than participants who did not experience CA in COVID-19 ASD (p = .032), but not in fear of COVID-19 (p = .65). Mediation analyses demonstrated two significant paths: in the first, CA was associated with elevated fear of COVID-19 (effect = .061, .059; p < 0.05) and COVID-19 ASD (effect = .14, .084; p < 0.05) through the mediation of CPTSD; in the second path, when controlling for the mediation of CPTSD, CA was associated with reduced fear of COVID-19 (effect = -.15; p = 0.001), and COVID-19 ASD (effect = -.12; p = 0.024).

CONCLUSIONS

The findings reveal a complex pattern, indicating that CPTSD may be a risk factor for elevated levels of COVID-19 distress among individuals who experienced CA. However, some CA survivors may express reduced COVID-19 distress.

"My own flesh and blood": The implications of child maltreatment for the orientation towards the body among dyads of mothers and daughters

BACKGROUND

Orientation to bodily signals reflects the ways in which individuals interpret their bodily sensations. Such orientation is formed within early interpersonal context. Findings reveal that trauma may result in catastrophic and fearful orientation towards bodily signals. However, not much is known regarding the link between trauma and orientation towards the body as manifested within a family intergenerational context.

OBJECTIVE

This study examines the link between child maltreatment, complex posttraumatic stress symptoms (CPTS symptoms), and a posttraumatic orientation to bodily signals among dyads of mothers and their young adult daughters.

PARTICIPANTS AND SETTING

194 mother-daughter dyads (mothers' mean age = 56, SD = 6.3; daughters' mean age = 26, SD = 3.03) completed self-reported questionnaires, assessing child maltreatment (CTQ), CPTS symptoms (ITQ), and orientation to bodily signals (pain catastrophizing, anxiety sensitivity-physical, body vigilance).

RESULTS

Orientation to bodily signals was associated with child maltreatment, through the mediation of CPTS symptoms among mothers (indirect effects between 0.13-0.28; p > 0.021) and daughters (indirect effects between 0.21-0.11; p > 0.032). Mothers' child maltreatment was associated with daughters' child maltreatment (effect = 0.35; p < 0.001), and mothers' orientation to bodily signals was associated with daughters' orientation (effects between 0.19-0.27; p < 0.016). Daughters' orientation to bodily signals was partially associated with mothers' child maltreatment through mothers' CPTS symptoms and orientation to body (indirect effect = 0.064; p = 0.023).

CONCLUSIONS

Child maltreatment is implicated in posttraumatic orientation towards bodily signals. Such secondary processes may be intergenerationally transmitted.

Physical and Mental Health and Functioning Among Traumatic Brain Injury Close Relatives: The Role of Posttraumatic Stress Symptoms

Severe Traumatic brain injury (sTBI) often instigates widespread long-lasting disability and is accompanied by extensive rehabilitation. Unsurprisingly, sTBI also holds malignant consequences for patients' close relatives. The burden caused by the injury and its severity explains some of the ramifications for the relatives. Additionally, some findings demonstrate that patients with sTBI and their relatives develop posttraumatic stress (PTS) symptoms. However, although the link between PTS symptoms and physical and mental health is well-documented in literature, the effect of PTS symptoms on relatives of patients with sTBI has barely been examined. This study examines the influence of PTS symptoms of patients with sTBI and their relatives on the physical and mental health and functioning of the relatives. Patients who sustained a severe sTBI (Abbreviated Injury Scale of the head region > 3) and close relatives were included in a multi-center, prospective cohort study (TRAST-MI). One-hundred patients and their relatives were assessed at 2, 6, and 12 months post injury. Outcome variables included health-related quality of life (SF-12) as well as emotional, cognitive, interpersonal, and total functioning (PCRS). Relatives' physical health was predicted by relatives' PTS symptoms (Slope=-1.76; p = .043), and mental health was predicted by both patients' (Slope=-2.77; p = .034) and relatives' (Slope=-6.59; p < .001) PTS symptoms. Functioning level was only predicted by patients' PTS symptoms (Slope=-.25; p_< .001). The findings emphasize that TBI should be considered a comprehensive traumatic experience reaching further than mere physical damage to the brain and its direct consequences, affecting the injured individual and close relatives.

Dysfunctional pain perception and modulation among torture survivors: The role of pain personification

OBJECTIVE

Individuals exposed to trauma, especially those who develop posttraumatic stress disorder (PTSD), are at a higher risk of suffering from chronic pain as well as altered pain perception and modulation. However, the underlying mechanisms of these processes are yet to be established. Recent findings have indicated that trauma survivors tend to personify chronic pain that is developed after the exposure, in a way that resonates with the traumatic experience. The aim of this study was to test whether pain personification plays a significant role in explaining the long-term links between trauma, PTSD and pain.

METHODS

This study is part of a large-scale longitudinal study on ex-prisoners of war (ex-POWs) from the 1973 Yom-Kippur war, who were followed over 35 years after the war. Fifty-nine ex-POWs who were exposed to torture and 44 matched combatants were assessed for PTSD at 18, 30, and 35 post-war. Quantitative somatosensory testing of heat-pain threshold, pain tolerance, conditioned pain modulation (CPM), and temporal summation of pain (TSP), as well as torturing personification, were assessed at 35 years after the war.

RESULTS

Sequential mediation analyses revealed that the associations between torture and heat pain threshold, as well as pain tolerance were mediated by PTSD at several time-points (-1.43<indirect effect < 1.47). Torturing personification significantly mediated the associations between torture, PTSD, CPM and TSP (-0.16 < indirect effect).

CONCLUSIONS

These findings point to the effect of trauma on the subjective orientation towards bodily signals as a key factor in dysfunctional pain modulation.