Reframe the Pain: A Randomized Controlled Trial of a Parent-Led Memory-Reframing Intervention

Parental narrative style moderates the relation between pain-related attention and memory biases in youth with chronic pain

ABSTRACT

Negatively biased pain memories robustly predict maladaptive pain outcomes in children. Both attention bias to pain and parental narrative style have been linked with the development of these negative biases, with previous studies indicating that how parents talk to their child about the pain might buffer the influence of children's attention bias to pain on the development of such negatively biased pain memories. This study investigated the moderating role of parental narrative style in the relation between pain-related attention and memory biases in a pediatric chronic pain sample who underwent a cold pressor task. Participants were 85 youth-parent dyads who reminisced about youth's painful event. Eye-tracking technology was used to assess youth's attention bias to pain information, whereas youth's pain-related memories were elicited 1 month later through telephone interview. Results indicated that a parental narrative style using less repetitive yes-no questions, more emotion words, and less fear words buffered the influence of high levels of youth's attention bias to pain in the development of negatively biased pain memories. Opposite effects were observed for youth with low levels of attention bias to pain. Current findings corroborate earlier results on parental reminiscing in the context of pain (memories) but stress the importance of matching narrative style with child characteristics, such as child attention bias to pain, in the development of negatively biased pain memories. Future avenues for parent-child reminiscing and clinical implications for pediatric chronic pain are discussed.

Social Determinants and Consequences of Pain: Toward Multilevel, Intersectional, and Life Course Perspectives

Despite wide endorsement of a biopsychosocial framework for pain, social aspects of pain remain rarely addressed in the context of pain prevention and management. In this review, we aim to 1) examine the broad scope of social determinants and consequences of pain and their interactions across multiple levels of organization, and 2) provide a framework synthesizing existing concepts and potential areas for future work on social aspects of pain, drawing upon socioecological, intersectional, and life course approaches. Integrating interdisciplinary theory and evidence, we outline pathways through which multilevel social factors and pain may affect each other over time. We also provide a brief summary of intrapersonal aspects of pain, which are thought to operate at the interface between individuals and the social context. Progressing from micro- to macrolevel factors, we illustrate how social determinants of pain can directly or indirectly contribute to pain experiences, expression, risk, prognosis, and impact across populations. We consider 1) at the interpersonal level, the roles of social comparison, social relatedness, social support, social exclusion, empathy, and interpersonal conflict; 2) at the group or community level, the roles of intimacy groups, task groups, social categories, and loose associations; and 3) at the societal level, the roles of political, economic, and cultural systems, as well as their policies and practices. We present examples of multilevel consequences of pain across these levels and discuss opportunities to reduce the burden and inequities of pain by expanding multilevel social approaches in pain research and practice. PERSPECTIVE: Despite wide endorsement of a biopsychosocial framework for pain, social aspects of pain are often unclearly defined, hindering their use in pain prevention, management, and research. We summarize the scope of social aspects of pain and provide a framework synthesizing existing concepts and potential areas for future work.

Narrative Accounts of Youth and Their Mothers With Chronic Headache: Application of a Socio-narratology Framework to Pain Narratives

OBJECTIVES

This study was the first to apply a socio-narratology framework to the narratives about child pain as told by youth with chronic pain and their parents, all of whom experience chronic headaches.

BACKGROUND

Storytelling is a powerful social transaction that occurs within systems (eg, families, clinical encounters) and is both shaped by, and can shape, the pain experience. Narrative can be harnessed as a clinical tool to aid in the ability to listen, understand, and improve clinical encounters.

METHODS

Twenty-six youth (aged 11 to 18 y) and their mothers, both with chronic headaches, recruited from a tertiary level pediatric pain clinic separately completed in-depth interviews about children's pain journey narratives. Data were analyzed using narrative analysis, which incorporated elements of socio-narratology to compare similarities and differences between and within dyads' narratives.

RESULTS

Five narrative types were generated: (1) The trauma origin story-parents, but not youth, positing traumatic events as the causal link to children's pain; (2) mistreated by the medical system-neglect, harm, and broken promises resulting in learned hopelessness or relying on the family system; (3) the invalidated-invalidation of pain permeated youth's lives, with mothers as empathic buffers; (4) washed away by the pain-challenges perceived as insurmountable and letting the pain take over; and (5) taking power back from pain-youth's ability to live life and accomplish goals despite the pain.

CONCLUSION

Findings support the clinical utility of narrative in pediatric pain, including both parents' and youths' narrative accounts to improve clinical encounters and cocreate more youth-centred, empowering narratives.

Harnessing Children's Picture Books to Socialize Children About Pain and Injury: A Qualitative Study

Pain experiences are common during childhood (eg, "everyday" pain, vaccine injections) and are powerful opportunities for children to learn about pain and injury. These experiences likely inform fundamental and life-long beliefs about pain. There is scant research investigating the sociocultural contexts in which children learn about pain and injury. One unexplored context is the shared reading of picture books (eg, between parents/caregivers and children). In this study, we investigated whether shared reading of picture books that included depictions of pain and/or injury prompted parent/caregiver-child interactions. If interactions were observed, we explored what those interactions entailed. Twenty parents/caregivers (8 men, 12 women) and their children (n = 27; 10 boys, 17 girls) were recruited from libraries in South Australia. Parent/caregiver-child families chose from 8 books (7 fiction, 1 nonfiction) with varying amounts of pain/injury-related content. Shared reading interactions were video recorded, transcribed, and analyzed alongside analysis of the picture books using reflexive thematic analysis. Pain/injury-related interactions were observed between parents/caregivers and children during shared reading of picture books. Qualitative analyses generated 1 main theme and 3 subthemes. Findings identified that shared reading presented an opportunity for children's understanding of pain and injury to be socialized through discussion of characters' experiences. This included teaching children about pain and injury, as well as promoting empathy and emotional attunement toward characters who were depicted as being in pain. Finally, parents/caregivers often responded with observable/expressed amusement if pain/injury was depicted in a light-hearted or unrealistic way. Overall, shared reading of picture books presents an untapped opportunity to socialize children about pain and injury. PERSPECTIVE: Shared reading of picture books that have depictions of pain and/or injury can prompt parent/caregiver-child interactions about pain and injury. These interactions present critical opportunities that can be harnessed to promote children's learning of adaptive pain-related concepts and behaviors during a critical developmental period.

Pain memory in children: a systematic review and meta-analysis with a meta-regression

ABSTRACT

The aim of this systematic review and meta-analysis was to analyze the accuracy of memory of pain and the variables that may influence it in children with acute, experimental, and chronic pain. We conducted a search in electronic databases from inception to February 11, 2022. Twelve observational studies and 3 randomized controlled studies were included in the study. The main outcome measure was the accuracy of the memory of the pain intensity (experienced/recalled). To compare the outcomes reported by the studies, we calculated the standardized mean difference (SMD) over time for the continuous variables. The overall meta-analysis showed a small effect size in favor of an overestimation of experienced pain intensity (SMD = 0.28). Subanalyzing per pain context, there was a small effect size in favor of overestimation in the clinical context (SMD = 0.33), but there was no evidence of any change in the accuracy of memory of pain in the experimental context (SMD = 0.07). The mean age of the participants and the proportion of girls significantly predicted the accuracy of the memory of pain. The period since the experienced pain measurement, the intensity of expected and recalled fear, trait anxiety, and anxiety sensitivity did not significantly predict the accuracy of the memory of pain. Children showed an overestimation in pain memory between the experienced and recalled intensity of acute pain, especially in a clinical context. Furthermore, only gender and age were predictors of the accuracy of pain memory. These results highlight the relevance of pain memory to medical practice and future research.

Writing to your past-self can make you feel better

Self-compassionate writing has been shown to be helpful for improving the mental state in some individuals. Here, we investigated how the writer's attitude toward his/her past, present and future and the focus of the writing, i.e., social experience in the past versus self-experience, modulate these effects. In Experiment 1, 150 undergraduates wrote a compassionate letter to their past-self and to their future-self and responded to the Japanese version of the Adolescent Time Inventory-Time Attitudes (ATI-TA) questionnaire. Writing to past-self decreased negative feelings more than writing to future-self. Further, participants who had negative feelings toward their past, present, and future, as assessed by the ATI-TA, were more likely to be emotionally affected by writing a letter to their past-self. In Experiment 2, 31 undergraduates wrote a letter focusing on what they had experienced together with someone, and another 31 undergraduates wrote focusing on what they had experienced alone. Focusing on a social experience was more helpful for recovering from negative feelings than focusing on a self-experience. In conclusion, writing a compassionate letter to one's past-self can improve mood, especially in individuals with a negative time attitude who focus their writing on a social connection.

Perspectives of Healthcare Providers to Inform the Design of an AI-Enhanced Social Robot in the Pediatric Emergency Department

Children commonly experience pain and distress in healthcare settings related to medical procedures such as blood tests and intravenous insertions (IVIs). Inadequately addressed pain and distress can result in both short- and long-term negative consequences. The use of socially assistive robotics (SARs) to reduce procedure-related distress and pain in children's healthcare settings has shown promise; however, the current options lack autonomous adaptability. This study presents a descriptive qualitative needs assessment of healthcare providers (HCPs) in two Canadian pediatric emergency departments (ED) to inform the design an artificial intelligence (AI)-enhanced social robot to be used as a distraction tool in the ED to facilitate IVIs. Semi-structured virtual individual and focus group interviews were conducted with eleven HCPs. Four main themes were identified: (1) common challenges during IVIs (i.e., child distress and resource limitations), (2) available tools for pain and distress management during IVIs (i.e., pharmacological and non-pharmacological), (3) response to SAR appearance and functionality (i.e., personalized emotional support, adaptive distraction based on child's preferences, and positive reinforcement), and (4) anticipated benefits and challenges of SAR in the ED (i.e., ensuring developmentally appropriate interactions and space limitations). HCPs perceive AI-enhanced social robots as a promising tool for distraction during IVIs in the ED.

Exploring the needs of children and caregivers to inform design of an artificial intelligence-enhanced social robot in the pediatric emergency department

Background & Objective

Socially assistive robots (SARs) are a promising tool to manage children's pain and distress related to medical procedures, but current options lack autonomous adaptability. The aim of this study was to understand children's and caregivers' perceptions surrounding the use of an artificial intelligence (AI)-enhanced SAR to provide personalized procedural support to children during intravenous insertion (IVI) to inform the design of such a system following a user-centric approach.

Methods

This study presents a descriptive qualitative needs assessment of children and caregivers. Data were collected via semi-structured individual interviews and focus groups. Participants were recruited from two Canadian pediatric emergency departments (EDs) between April 2021 and January 2022.

Results

Eleven caregivers and 19 children completed 27 individual interviews and one focus group. Three main themes were identified: A. Experience in the clinical setting, B. Acceptance of and concerns surrounding SARs, and C. Features that support child engagement with SARs. Most participants expressed comfort with robot technology, however, concerns were raised about sharing personal information, photographing/videotaping, and the possibility of technical failure. Suggestions for feature enhancements included increasing movement to engage a child's attention and tailoring language to developmental age. To enhance the overall ED experience, participants also identified a role for the SAR in the waiting room.

Conclusion

Artificial intelligence-enhanced SARs were perceived by children and caregivers as a promising tool for distraction during IVIs and to enhance the overall ED experience. Insights collected will be used to inform the design of an AI-enhanced SAR.

A Randomized Controlled Trial of a Parent-Led Memory-Reframing Intervention to Reduce Distress and Pain Associated with Vaccine Injections in Young Children

Children remember their memories of pain long after the painful experience is over. Those memories predict higher levels of future pain intensity. Young children's memories can be reframed to be less distressing. Parents and the way they reminisce about past events with their children play a key role in the formation of pain memories. A novel parent-led memory-reframing intervention changed children's memories of post-surgical pain to be less distressing. The intervention efficacy in the context of vaccine injections is unclear. This registered randomized controlled trial (NCT05217563) aimed to fill this gap. Seventy-four children aged 4.49 years (SD = 1.05) and scheduled to obtain two COVID-19 vaccine injections and one of their parents were randomized to receive: (1) standard care; (2) standard care and memory-reframing information; and (3) standard care and memory-reframing information with verbal instructions. Children reported their pain after vaccine injections. One week after the first vaccination, children reported memory of pain. Parents reported their use of memory-reframing strategies and intervention feasibility and acceptability. The intervention did not result in significant differences in children's recalled or future pain. Parents rated the intervention as acceptable and feasible.

The Effect of Robot-Led Distraction during Needle Procedures on Pain-Related Memory Bias in Children with Chronic Diseases: A Pilot and Feasibility Study

The current study evaluated the feasibility and preliminary clinical impact of robot-led distraction during needle procedures in children with chronic diseases on pain-related memories. Participants were 22 children (8−12 years old) diagnosed with a chronic disease (e.g., chronic immune deficiency) and undergoing a needle procedure as part of their routine treatment. Children were randomized to the experimental group (i.e., robot-led distraction) or control group (i.e., usual care). For feasibility, we evaluated study- and needle-procedure-related characteristics, intervention fidelity and acceptability, and nurse perceptions of the intervention. Primary clinical outcomes included children’s memory bias for pain intensity and pain-related fear (1 week later). Results indicated that intervention components were >90% successful. Overall, the robot-led distraction intervention was perceived highly acceptable by the children, while nurse perceptions were mixed, indicating several challenges regarding the intervention. Preliminary between-group analyses indicated a medium effect size on memory bias for pain intensity (Hedges’ g = 0.70), but only a very small effect size on memory bias for pain-related fear (Hedges’ g = 0.09), in favor of the robot-led distraction intervention. To summarize, while feasible, certain challenges remain to clinically implement robot-led distraction during needle procedures. Further development of the intervention while accounting for individual child preferences is recommended.

The power of negative and positive episodic memories

The power of episodic memories is that they bring a past moment into the present, providing opportunities for us to recall details of the experiences, reframe or update the memory, and use the retrieved information to guide our decisions. In these regards, negative and positive memories can be especially powerful: Life’s highs and lows are disproportionately represented in memory, and when they are retrieved, they often impact our current mood and thoughts and influence various forms of behavior. Research rooted in neuroscience and cognitive psychology has historically focused on memory for negative emotional content. Yet the study of autobiographical memories has highlighted the importance of positive emotional memories, and more recently, cognitive neuroscience methods have begun to clarify why positive memories may show powerful relations to mental wellbeing. Here, we review the models that have been proposed to explain why emotional memories are long-lasting (durable) and likely to be retrieved (accessible), describing how in overlapping—but distinctly separable—ways, positive and negative memories can be easier to retrieve, and more likely to influence behavior. We end by identifying potential implications of this literature for broader topics related to mental wellbeing, education, and workplace environments.

Reframe the pain: Divided attention and positive memory reframing to reduce needle pain and distress in children-A feasibility randomized controlled trial

BACKGROUND

Negative experiences of needle procedures in childhood can lead to medical avoidance and vaccine hesitancy into adulthood. We evaluated the feasibility of two new interventions provided by clinical nurses to reduce the negative impact of vaccinations: divided attention (DA) and positive memory reframing (PMR).

METHODS

Children (8-12 years) were randomized into four groups: usual care (UC), DA, PMR or combined (DA + PMR). To evaluate feasibility, we undertook in-depth analysis of video-recorded interventions, nurse experiences (phone interviews) and child/parent memory recall of interventions (phone interviews at 2 weeks post-vaccination). Key clinical outcomes included child and parent ratings of needle-related pain intensity and fear assessed at baseline, immediately post-vaccination and 2 weeks post-vaccination (recalled).

RESULTS

A total of 54 child-parent dyads were screened, with 41 included (10/group, except PMR [n = 11]). The interventions were not always completed as intended: 10%-22% of participants received complete interventions and two had adverse events related to protocol breach. Preliminary within-group analyses showed no effects on child/parent pain ratings. However, children in DA + PMR had reduced recalled fear (p = 0.008), and PMR (p = 0.025) and DA + PMR (p = 0.003) had reduced fear of future needles. Parent ratings of child fear were also reduced immediately post-vaccination for UC (p = 0.035) and PMR (p = 0.035).

CONCLUSIONS

The interventions were feasible, although enhanced nurse training is required to improve fidelity. Preliminary clinical results appear promising, particularly for reducing needle-related fear.

PROTOCOL REGISTRATION

Protocol number ACTRN12618000687291 at ANZCTR.org.au SIGNIFICANCE: Two new nurse-led interventions to reduce negative impacts of vaccinations in children, divided attention and positive memory reframing, were feasible and may reduce needle-related fear. Nurses were able to deliver the interventions in various environments including non-clinical settings (schools). These interventions have potential to facilitate broader dissemination of vaccinations for children in a manner that minimizes distress.

Communicating with children about 'everyday' pain and injury: A Delphi study

BACKGROUND

'Everyday' pain experiences are potentially critical in shaping our beliefs and behaviours around injury and pain. Influenced by social, cultural and environmental contexts, they form the foundation of one's understanding of pain and injury that is taken into adulthood. How to best communicate to young children about their everyday pain experiences, in order to foster adaptive beliefs and behaviours, is unknown.

METHODS

In this Delphi survey, we sought expert opinion on the key messages and strategies that parents/caregivers can consider when communicating with young children (aged 2-7 years) about 'everyday' pain that is most likely to promote recovery, resilience and adaptive pain behaviours. Eighteen experts participated including specialists in paediatric pain, trauma, child development, and psychology; educators and parents. The survey included three rounds.

RESULTS

Response rate was over 88%. Two hundred fifty-three items were raised; 187 reached 'consensus' (≥80% agreement among experts). Key messages that the experts agreed to be 'very important' were aligned with current evidence-based understandings of pain and injury. Strategies to communicate messages included parent/caregiver role-modelling, responses to child pain, and discussion during and/or after a painful experience. Other key themes included promoting emotional development, empowering children to use active coping strategies, and resilience building.

CONCLUSIONS

This diverse set of childhood, pain and parenting experts reached consensus on 187 items, yielding 12 key themes to consider when using everyday pain experiences to promote adaptive pain beliefs and behaviours in young children.

Portrayals of Pain in Children's Popular Media: Mothers' and Fathers' Beliefs and Attitudes

Evidence suggests that children's popular media may model maladaptive and distorted experiences of pain to young children. In a recent study, pain depicted in popular media targeting 4–6-year-olds was frequently and unrealistically portrayed, evoked little response or empathy from observing characters, and perpetuated unhelpful gender stereotypes. Parents play a critical role in both children's pain experiences and children's media consumption. Yet, no study to date has examined parents' beliefs and attitudes regarding how pain is portrayed in media for young children. The present study aimed to fill this gap by examining how parents perceive and appraise painful instances depicted in children's popular media. Sixty parents (48% fathers) of children aged 4 to 6 years completed a semi-structured interview to assess their general beliefs and attitudes toward how pain is portrayed in children's media. Inductive reflexive thematic analysis was conducted to identify and analyze key patterns in the data. Qualitative analyses generated two major themes representing parental beliefs regarding pain that is portrayed in children's media: “entertaining pain” and “valuable lessons”. Findings reveal that parents believe that pain portrayed in popular media serves either a function of entertaining and amusing children or can provide valuable lessons about appropriate emotional responses and empathic reactions. Further, pain portrayals could also instill valuable lessons and provide children with a point of reference and language for their own painful experiences. Parents serve as a primary socialization agent for young children; thus, it is important that parents remain aware of underlying messages about how pain is portrayed in children's popular media so that they can optimally discuss these portrayals, promote their children's pain education and understanding and positively impact future pain experiences.

Let's (Not) Talk About Pain: Mothers' and Fathers' Beliefs Regarding Reminiscing About Past Pain

Children's memories for past pain set the stage for their future pain experiences. Parent-child reminiscing about pain plays a key role in shaping children's pain memories. Parental beliefs about the functions of reminiscing are associated with parental reminiscing behaviors. To date, no studies have investigated parental beliefs regarding the functions of reminiscing about past pain or the associations between parental beliefs and reminiscing about past pain. This study aimed to fill these gaps. One-hundred and seven parents (52% fathers) of young children were asked about their beliefs regarding reminiscing about past pain. Interview data were first analyzed using inductive reflexive thematic analysis. A coding scheme was created based on the generated themes to quantitatively characterize parental beliefs. Parents also reminisced with their children about unique past events involving pain. Parent-child reminiscing narratives were coded to capture parent reminiscing behaviors. Inductive reflexive thematic analysis generated three major themes representing parental beliefs regarding reminiscing about past pain: “reminiscing to process past pain,” “reminiscing as a learning tool,” and “avoiding reminiscing about past pain.” Parents who endorsed avoiding reminiscing used fewer optimal reminiscing elements (i.e., open-ended questions) when reminiscing about past painful experiences with children. Parents who endorsed reminiscing to process past pain used more emotion-laden language when reminiscing about past pain. Mothers and fathers of boys and girls endorsed the reminiscing functions to a similar degree. Parents of older, vs. younger, children endorsed reminiscing to process past pain to a greater degree. Developmental considerations and clinical implications of the findings are discussed.

A Memory-Reframing Intervention to Reduce Pain in Youth Undergoing Major Surgery: Pilot Randomized, Controlled Trial of Feasibility and Acceptability

Background

Three to 22% of youth undergoing surgery develop chronic postsurgical pain (CPSP). Negative biases in pain memories (i.e., recalling higher levels of pain as compared to initial reports) are a risk factor for CPSP development. Children’s memories for pain are modifiable. Existing memory-reframing interventions reduced negatively biased memories associated with procedural pain and pain after minor surgery. However, not one study has tested the feasibility and acceptability of the memory-reframing intervention in youth undergoing major surgery.

Aims

The current pilot randomized clinical trial (RCT; NCT03110367; clinicaltrials.gov) examined the feasibility and acceptability of, as well as adherence to, a memory reframing intervention.

Methods

Youth undergoing a major surgery reported their baseline and postsurgery pain levels. Four weeks postsurgery, youth and one of their parents were randomized to receive control or memory-reframing instructions. Following the instructions, parents and youth reminisced about the surgery either as they normally would (control) or using the memory-reframing strategies (intervention). Six weeks postsurgery, youth completed a pain memory interview; parents reported intervention acceptability. Four months postsurgery, youth reported their pain.

Results

Seventeen youth (76% girls, M_age = 14.1 years) completed the study. The intervention was feasible and acceptable. Parents, but not youth, adhered to the intervention principles. The effect sizes of the intervention on youth pain memories (η_p² = 0.22) and pain outcomes (η_p² = 0.23) were used to inform a larger RCT sample size.

Conclusions

Memory reframing is a promising avenue in pediatric pain research. Larger RCTs are needed to determine intervention efficacy to improve pain outcomes.

Mother– and Father–Child Reminiscing About Past Events Involving Pain, Fear, and Sadness: Observational Cohort Study

Objective

Pain in childhood is prevalent and is associated with fear, particularly in the context of injuries or procedural pain, and negative emotions (e.g., sadness). Pain and fear share a bidirectional relationship, wherein fear exacerbates the experience of pain and pain increases subsequent anticipatory fear. The existing research has focused primarily on children’s immediate experience of pain and fear. Research on how children remember or talk about past painful, fearful, or sad events is lacking. Parent–child reminiscing about past pain has been demonstrated to differ from reminiscing about other past negative emotional events (i.e., those involving sadness, but not fear). The present study aimed to examine differences in how parent–child dyads reminisce about past pain, fear, and sadness.

Methods

One hundred and three 4-year-old children (55% girls) and their parents (52% fathers) engaged in a narrative elicitation task in which they reminisced about unique past events involving pain, fear, and sadness. Parent–child narratives were coded using established coding schemes based on the developmental psychology literature.

Results

Parent–child narratives about pain were characterized by fewer emotion-laden words and explanations, as well as more pain-related words compared to sadness or fearful narratives. Mothers and fathers reminisced with sons and daughters in a similar way across all types of events.

Conclusions

Parent–children reminiscing about past painful events differs from reminiscing about other types of distressing events (e.g., involving sadness or fear). This highlights a possibility of differential socialization of pain versus fear. Potential clinical implications of the findings are discussed.

Contextual control of conditioned pain tolerance and endogenous analgesic systems

The mechanisms underlying the transition from acute to chronic pain are unclear but may involve the persistence or strengthening of pain memories acquired in part through associative learning. Contextual cues, which comprise the environment in which events occur, were recently described as a critical regulator of pain memory; both male rodents and humans exhibit increased pain sensitivity in environments recently associated with a single painful experience. It is unknown, however, how repeated exposure to an acute painful unconditioned stimulus in a distinct context modifies pain sensitivity or the expectation of pain in that environment. To answer this question, we conditioned mice to associate distinct contexts with either repeated administration of a mild visceral pain stimulus (intraperitoneal injection of acetic acid) or vehicle injection over the course of 3 days. On the final day of experiments, animals received either an acid injection or vehicle injection prior to being placed into both contexts. In this way, contextual control of pain sensitivity and pain expectation could be tested respectively. When re-exposed to the noxious stimulus in a familiar environment, both male and female mice exhibited context-dependent conditioned analgesia, a phenomenon mediated by endogenous opioid signaling. However, when expecting the presentation of a painful stimulus in a given context, males exhibited conditioned hypersensitivity whereas females exhibited endogenous opioid-mediated conditioned analgesia. These results are evidence that pain perception and engagement of endogenous opioid systems can be modified through their psychological association with environmental cues. Successful determination of the brain circuits involved in this sexually dimorphic anticipatory response may allow for the manipulation of pain memories, which may contribute to the development of chronic pain states.