Oxytocin modulates neural reactivity in women to emotional stimuli of children depending on childhood emotional neglect

Sensitivity for rewarding cues and distress signals from children are fundamental to human caregiving, and modulated by the neuropeptide oxytocin. In a functional magnetic resonance imaging (fMRI) study we investigated whether oxytocin regulates neural responses to reward or distress cues form children. In a placebo controlled within-subject design we measured neural responses to positive, negative and neutral cues from children in 22 healthy female subjects who received oxytocin (24 IU) vs. placebo. Further, based on current literature, we hypothesized that oxytocin effects are modulated by experiences of childhood trauma. The task elicited valence specific effects, positive images activated the ventromedial prefrontal cortex, left anterior cingulate cortex and right putamen, and images of children in distress the bilateral amygdala, hippocampus and right medial superior frontal cortex. The effects of oxytocin depended on subjective reports of childhood emotional neglect. Self-reported neglect interacted with oxytocin administration in the amygdala, hippocampus and prefrontal areas. In individuals with higher scores of emotional neglect, oxytocin increased neural reactivity of limbic structures to positive and neutral images. Our findings need replication in larger samples but are in line with the recent literature on the modulating effect of childhood adversity on the sensitivity to OXT administration.

Classism in Pain Care: The Role of Patient Socioeconomic Status on Nurses’ Pain Assessment and Management Practices

Objective Research on social disparities in pain care has been mainly focused on the role of race/racism and sex/sexism. Classism in pain assessment and management practices has been much less investigated. We aimed to test the effect of patient socioeconomic status (SES; a proxy of social class) on nurses’ pain assessment and management practices and whether patient SES modulated the effects of patient distress and evidence of pathology on such practices. Design Two experimental studies with a two (patient SES: low/high) by two (patient distress or evidence of pathology: absent/present) between-subject design. Subjects Female nurses participated in two experimental studies (N = 150/N = 158). Methods Nurses were presented with a vignette/picture depicting the clinical case of a female with chronic low back pain, followed by a video of the patient performing a pain-inducing movement. Afterwards, nurses reported their pain assessment and management practices. Results The low-SES patient’s pain was assessed as less intense, more attributed to psychological factors, and considered less credible (in the presence of distress cues) than the higher-SES patient’s pain. Higher SES buffered the detrimental impact of the presence of distress cues on pain assessment. No effects were found on management practices. Conclusions Our findings point to the potential buffering role of SES against the detrimental effect of certain clinical cues on pain assessments. This study contributes to highlighting the need for further investigation of the role of SES/social class on pain care and its underlying meanings and processes.

Stem cells repurpose proliferation to contain a breach in their niche barrier

Adult stem cells are responsible for life-long tissue maintenance. They reside in and interact with specialized tissue microenvironments (niches). Using murine hair follicle as a model, we show that when junctional perturbations in the niche disrupt barrier function, adjacent stem cells dramatically change their transcriptome independent of bacterial invasion and become capable of directly signaling to and recruiting immune cells. Additionally, these stem cells elevate cell cycle transcripts which reduce their quiescence threshold, enabling them to selectively proliferate within this microenvironment of immune distress cues. However, rather than mobilizing to fuel new tissue regeneration, these ectopically proliferative stem cells remain within their niche to contain the breach. Together, our findings expose a potential communication relay system that operates from the niche to the stem cells to the immune system and back. The repurposing of proliferation by these stem cells patch the breached barrier, stoke the immune response and restore niche integrity.

Callous unemotional traits, low cortisol reactivity and physical aggression in children: findings from the Wirral Child Health and Development Study

Callous-unemotional (CU) traits are thought to confer risk for aggression via reduced amygdala responsivity to distress cues in others. Low cortisol reactivity is thought to confer risk for aggression via reduced arousal and this effect may be confined to boys. We tested the hypothesis that the association between childhood CU traits and aggression would be greatest in the absence of the inhibitory effects of cortisol reactivity, and that this effect would be sex dependent. Participants were 283 members of a stratified subsample within an epidemiological longitudinal cohort (WCHADS). Cortisol reactivity to a social stressor was assessed at 5 years. CU traits were reported by mothers at 5 years, and physical aggression by mothers and teachers at age 7. Results showed that CU traits were associated with elevated aggression at 7 years controlling for earlier aggression. There was no main effect of cortisol reactivity on regression. The association between CU traits and aggression was moderated by cortisol reactivity (p = .011) with a strong association between CU traits and aggression in the presence of low reactivity, and a small and non-significant association in the presence of high reactivity. This association was further moderated by child sex (p = .041) with the joint effect of high CU traits and low cortisol reactivity seen only in boys (p = .016). We report first evidence that a combined deficit in inhibitory processes associated with CU traits and low cortisol reactivity increases risk for childhood aggression, in a sex dependent manner.

Mothers’ Neural and Behavioral Responses to Their Infants’ Distress Cues: The Role of Secure Base Script Knowledge

This research examined mothers’ secure base script knowledge—reflected in the ability to generate narratives in which attachment-relevant problems are recognized, competent help is offered, and problems are resolved—and its significance for early-stage processing of infants’ distress cues, using event-related potentials in an emotion oddball task. Mothers with lower secure base script knowledge exhibited (a) a heightened P3b response—reflective of greater allocation of cognitive resources—to their infants’ distressed (but not happy) target facial expressions; (b) a larger P3b response to their infants’ distressed (compared with happy) target facial expressions, which is indicative of allocating disproportional attentional resources to processing their infants’ distress; and (c) poorer accuracy in identifying their infants’ distressed target facial expressions. Findings suggest that mothers’ attachment-relevant biases in processing their infants’ emotion cues are especially tied to infant distress and shed light on underlying mechanisms linking mothers’ attachment representations with sensitive responding to infant distress.

Amygdala–midbrain connectivity indicates a role for the mammalian parental care system in human altruism

Costly altruism benefitting a stranger is a rare but evolutionarily conserved phenomenon. This behaviour may be supported by limbic and midbrain circuitry that supports mammalian caregiving. In rodents, reciprocal connections between the amygdala and the midbrain periaqueductal grey (PAG) are critical for generating protective responses toward vulnerable and distressed offspring. We used functional and structural magnetic resonance imaging to explore whether these regions play a role in supporting costly altruism in humans. We recruited a rare population of altruists, all of whom had donated a kidney to a stranger, and measured activity and functional connectivity of the amygdala and PAG as altruists and matched controls responded to care-eliciting scenarios. When these scenarios were coupled with pre-attentive distress cues, altruists' sympathy corresponded to greater activity in the left amygdala and PAG, and functional connectivity analyses revealed increased coupling between these regions in altruists during this epoch. We also found that altruists exhibited greater fractional anisotropy within the left amygdala–PAG white matter tract. These results, coupled with previous evidence of altruists' increased amygdala-linked sensitivity to distress, are consistent with costly altruism resulting from enhanced care-oriented responses to vulnerability and distress that are supported by recruitment of circuitry that supports mammalian parental care.

Understanding the development of psychopathy: progress and challenges

Psychopathy is an adult condition that incurs substantial societal and individual costs. Here we review neurocognitive and genetically informative studies that shed light on how and why this condition emerges. Children cannot present with psychopathy. However, the presence of callous–unemotional (CU) traits can distinguish a group of children who are at elevated risk of psychopathy in adulthood. These children display diminished empathy and guilt and show attenuated brain activation to distress cues in others. Genetically informative studies indicate that individual differences in CU traits show moderate-to-strong heritability, but that protective environmental factors can counter heritable risk. On the basis of the extant research findings, we speculate on what might represent the priorities for research over the next decade. We also consider the clinical implications of these research findings. In particular, we consider the importance of delineating what precisely works for children with CU traits (and their parents) and the ways in which intervention and prevention programs may be optimized to improve engagement as well as clinical outcomes.

Mothers Who Were Neglected in Childhood Show Differences in Neural Response to Their Infant’s Cry

The present study used functional magnetic resonance imaging to investigate how a mother’s experience of neglect in her own childhood is associated with her neural response to her infant’s distress cues. During scanning, 22 high-risk primiparous mothers were exposed to both their own 18-month-old infant’s cry sound and a control sound. Mothers’ continuous Neglect subscale scores from the Childhood Trauma Questionnaire were examined as a predictor of their neural response to own infant cry > control sound. Mothers who reported high levels of neglect from childhood showed regions of hyperactivation to their infant’s cry (relative to control sound) in the anterior and posterior cingulate cortices and insula as well as specific prefrontal (precentral gyrus) and parietal (posterior supramarginal gyrus) areas. These results may suggest how important early life experiences are for future parenting responses and behaviors.