Differential responses to infant faces in relation to maternal substance use: An exploratory study

The extended neural architecture of human attachment: An fMRI coordinate-based meta-analysis of affiliative studies

Functional imaging studies and clinical evidence indicate that cortical areas relevant to social cognition are closely integrated with evolutionarily conserved basal forebrain structures and neighboring regions, enabling human attachment and affiliative emotions. The neural circuitry of human affiliation is continually being unraveled as functional magnetic resonance imaging (fMRI) becomes increasingly prevalent, with studies examining human brain responses to various attachment figures. However, previous fMRI meta-analyses on affiliative stimuli have encountered challenges, such as low statistical power and the absence of robustness measures. To address these issues, we conducted an exhaustive coordinate-based meta-analysis of 79 fMRI studies, focusing on personalized affiliative stimuli, including one's infants, family, romantic partners, and friends. We employed complementary coordinate-based analyses (Activation Likelihood Estimation and Signed Differential Mapping) and conducted a robustness analysis of the results. Findings revealed cluster convergence in cortical and subcortical structures related to reward and motivation, salience detection, social bonding, and cognition. Our study thoroughly explores the neural correlates underpinning affiliative responses, effectively overcoming the limitations noted in previous meta-analyses. It provides an extensive view of the neural substrates associated with affiliative stimuli, illuminating the intricate interaction between cortical and subcortical regions. Our findings significantly contribute to understanding the neurobiology of human affiliation, expanding the known human attachment circuitry beyond the traditional basal forebrain regions observed in other mammals to include uniquely human isocortical structures.

Maternal alcohol dependence symptoms, maternal insensitivity to children's distress, and young children's blunted emotional reactivity

Maternal insensitivity to children's emotional distress (e.g., expressions of sadness or fearfulness) is one mechanism through which maternal alcohol dependence may increase children's risk for psychopathology. Although emotion dysregulation is consistently associated with psychopathology, it remains unclear how or why alcohol dependence's effects on caregiving responses to children's distress may impact children's emotion regulation over time, particularly in ways that may engender risks for psychopathology. This study examined longitudinal associations between lifetime maternal alcohol dependence symptoms, mothers' insensitivity to children's emotional distress cues, and children's emotional reactivity among 201 mother-child dyads (Mchild age = 2.14 years; 56% Black; 11% Latino). Structural equation modeling analyses revealed a significant mediational pathway such that maternal alcohol dependence predicted increases in mothers' insensitivity to children's emotional distress across a one-year period (β = .16, p = .013), which subsequently predicted decreases in children's emotional reactivity one year later (β = -.29, p = .009). Results suggest that mothers with alcohol dependence symptoms may struggle to sensitively respond to children's emotional distress, which may prompt children to suppress or hide their emotions as an adaptive, protective strategy. The potential developmental benefits and consequences of early, protective expressive suppression strategies are discussed via developmental psychopathology frameworks.

Neural correlates of altered emotional responsivity to infant stimuli in mothers who use substances

Mothers who use substances during pregnancy and postpartum may have altered maternal behavior towards their infants, which can have negative consequences on infant social-emotional development. Since maternal substance use has been associated with difficulties in recognizing and responding to infant emotional expressions, investigating mothers' subjective responses to emotional infant stimuli may provide insight into the neural and psychological processes underlying these differences in maternal behavior. In this study, 39 mothers who used substances during the perinatal period and 42 mothers who did not underwent functional magnetic resonance imaging while viewing infant faces and hearing infant cries. Afterwards, they rated the emotional intensity they thought each infant felt ('think'-rating), and how intensely they felt in response to each infant stimulus ('feel'-rating). Mothers who used substances had lower 'feel'-ratings of infant stimuli compared to mothers who did not. Brain regions implicated in affective processing (e.g., insula, inferior frontal gyrus) were less active in response to infant stimuli, and activity in these brain regions statistically predicted maternal substance-use status. Interestingly, 'think'-ratings and activation in brain regions related to cognitive processing (e.g., medial prefrontal cortex) were comparable between the two groups of mothers. Taken together, these results suggest specific neural and psychological processes related to emotional responsivity to infant stimuli may reflect differences in maternal affective processing and may contribute to differences in maternal behavior in mothers who use substances compared to mothers who do not. The findings suggest potential neural targets for increasing maternal emotional responsivity and improving child outcomes.

Maternal History of Childhood Maltreatment and Brain Responses to Infant Cues Across the Postpartum Period

Adults with histories of childhood maltreatment (CM) are more likely to display problematic parenting behaviors. The goal of this study was to examine changes in maternal brain activation to negative infant cues over the early postpartum period among new mothers with and without histories of CM, as this is a period of immense neuroplasticity in the maternal brain. CM was measured using the Adverse Childhood Experiences Scale. Functional magnetic resonance imaging (fMRI) conducted at approximately 5 and 13 weeks postpartum measured brain responses to own and unfamiliar infant cues in primiparous women. Women with histories of CM displayed increasing activation in the anterior cingulate cortex, and greater increases in anterior cingulate cortex activation was associated with maternal reports of less regulatory capacity in their infants. Preliminary results suggest that new mothers with CM histories display greater brain responses to negative infant cues compared to new mothers without CM histories. Women with CM histories may benefit from additional supports during the transition to parenthood.

Early emotional caregiving environment and associations with memory performance and hippocampal volume in adolescents with prenatal drug exposure

Early adversities, including prenatal drug exposure (PDE) and a negative postnatal emotional caregiving environment, impact children's long-term development. The protracted developmental course of memory and its underlying neural systems offer a valuable framework for understanding the longitudinal associations of pre- and postnatal factors on children with PDE. This study longitudinally examines memory and hippocampal development in 69 parent-child dyads to investigate how the early caregiving emotional environment affects children with PDE's neural and cognitive systems. Measures of physical health, drug exposure, caregiver stress, depression, and distress were collected between 0 and 24 months At age 14 years, adolescents completed multiple measures of episodic memory, and at ages 14 and 18 years, adolescents underwent magnetic resonance imaging (MRI) scans. Latent constructs of episodic memory and the caregiving environment were created using Confirmatory Factor Analysis. Multiple regressions revealed a negative emotional caregiving environment during infancy was associated with poor memory performance and smaller left hippocampal volumes at 14 years. Better memory performance at 14 years predicted larger right hippocampal volume at 18 years. At 18 years, the association between the emotional caregiving environment and hippocampal volume was moderated by sex, such that a negative emotional caregiving environment was associated with larger left hippocampal volumes in males but not females. Findings suggest that the postnatal caregiving environment may modulate the effects of PDE across development, influencing neurocognitive development.

Cannabis use during pregnancy and hemodynamic responses to infant cues in pregnancy: an exploratory study

Introduction

Cannabis is one of the most commonly used substances during pregnancy and has the potential to negatively impact parent-infant relationships. The prefrontal cortex (PFC) response to infant cues during pregnancy has been associated with subsequent positive parenting behaviors. However, PFC activation is altered in individuals who use cannabis. As the potency of cannabis has changed over the years, little is known about the specific role of cannabis use on gestational parent brain responses to infant cues.

Materials and methods

Using functional Near-Infrared Spectroscopy (fNIRS) in the second trimester of pregnancy, we measured hemodynamic responses to an infant cry task and an infant faces task among individuals who were using cannabis (N = 14) and compared them with those who were not using cannabis (N = 45). For the infant cry task, pregnant individuals listened to cry sounds and matched white noise. For the infant faces task, they viewed happy, sad, and neutral faces.

Results

There was no significant difference between the two groups after adjusting for multiple comparisons. Without adjusting for multiple comparisons, we found preliminary evidence for the differences in the dorsomedial PFC associated with heightened response to infant cry among individuals who use cannabis. The groups were also different in the dorsolateral PFC associated with decreased response to infant sad faces among individuals who use cannabis.

Discussion

Our preliminary data suggests that cannabis use during pregnancy was associated with brain activation in the regions involved in the emotional regulation and information processes. However, the results did not survive after adjustment for multiple comparisons, thus future research with larger sample sizes is needed to confirm potential differences in brain function among cannabis-using pregnant individuals.

Mothering from the Inside Out: Results of a community-based randomized efficacy trial testing a mentalization-based parenting intervention for mothers with addictions

Mothering from the Inside Out (MIO) is a mentalization-based parenting intervention developed to address challenges common among mothers experiencing substance use disorders (SUDs) and previously deemed effective when delivered by research clinicians. This randomized clinical trial was designed to test the efficacy of MIO when delivered by community-based addiction counselors in Connecticut, USA. Ninety-four mothers [M(SD)age = 31.01(4.01) years; 75.53% White] caring for a child 11-60 months of age were randomly assigned to participate in 12 sessions of either MIO or psychoeducation. Caregiving, psychiatric, and substance use outcomes were assessed repeatedly from baseline through 12-week follow-up. Mothers who participated in MIO showed decreased certainty about their child's mental states, and decreased depression; their children demonstrated increased clarity of cues. Participation in MIO was not associated with the same degree of improvement that was observed in prior trials where MIO was delivered by research clinicians. However, when delivered by community-based clinicians, MIO may be protective against a deterioration in caregiving over time often seen in mothers with addictions. The drop in efficacy of MIO in this trial raises questions about intervention-intervenor fit. Research should examine factors influencing MIO effectiveness to close the science-to-service gap common in the dissemination of empirically validated interventions.

An intergenerational lifespan perspective on the neuroscience of prenatal substance exposure

Prenatal substance exposure has the potential to impact a variety of domains, with neurobiological effects that last throughout the lifespan. Different substances may impact the brain in both specific and diffuse ways; however, the aberrant neural outcomes following exposure tend to coalesce in three areas: (1) sensorimotor development; (2) arousal, motivation, and reward; and (3) executive functioning, impulse control, and emotion regulation. This manuscript represents a summary and update of a previous review (Morie et al., 2019). We organize this piece by domain and summarize data from published neuroimaging studies that examine the neural correlates of prenatal exposure across developmental stages. While the published neuroimaging literature in the area of prenatal exposure has a range of sampling concerns that may limit generalizability as well as longitudinal prediction, the findings to date do point to domains of interest warranting further study. With this caveat, we synthesize the extant findings to describe ways in which prenatal substance exposure is associated with developmental psychopathology and implicated in potentially aberrant behavioral patterns beginning in infancy and persisting through childhood, adolescence, adulthood, and even parenthood. We also examine how substance abuse may impact parenting behaviors that in turn influences infant and child behavior in ways that may be additive or obscure the direct teratological effects of prenatal exposure. Given this observation, we offer an additional intergenerational lens through which prenatal substance exposure should be studied.

Exploring resting frontal EEG and reflective functioning in maternal substance use

Maternal substance use is associated with altered neural activity and poor offspring outcomes, which may be facilitated by suboptimal caregiving in the form of impaired parental reflective functioning (PRF). To investigate these associations, the resting-state frontal electroencephalography (EEG) power of 48 substance-using mothers and 37 non-substance-using mothers were examined, specifying seven frequency bands: delta, theta, alpha, alpha1, alpha2, beta, and gamma. Substance-using mothers exhibited enhanced beta and gamma spectral power compared to non-substance-using mothers, potentially reflecting higher arousal states in substance-using mothers. There were no between-group differences in any component of PRF (i.e., levels of pre-mentalizing, certainty, and interest and curiosity). Whole-sample analyses revealed significant positive correlations between pre-mentalizing and delta spectral power. Taken together, these findings suggest potential neural correlates of maternal substance use and PRF, providing an important next step into examining associations between maternal substance use and poor child outcomes.

Are empathic processes mechanisms of pregnancy's protective effect on smoking? Identification of a novel target for preventive intervention

BACKGROUND

Spontaneous cessation and reduction in smoking by pregnant women suggest that concern about others, or empathy, could be a malleable target for intervention. We examined various empathy-related processes in relations to reported and biochemically assessed smoking during pregnancy.

METHODS

Participants were 154 pregnant women (M = 12.4 weeks gestation, SD = 4.6) who were smoking cigarettes immediately prior to pregnancy recognition (85 had quit and 69 were still smoking at enrollment). Empathy-related processes were measured with performance-based paradigms (affect sharing, empathic concern, and theory of mind) and a speech sample (expressed emotion). Smoking was assessed with timeline follow back interviews and urine cotinine assays. Using zero-inflated Poisson regression models, we tested direct and interactive effects of empathy-related processes with respect to biologically verified smoking cessation (zero portion); and mean cigarettes/day smoked after pregnancy recognition among persistent smokers (count portion).

RESULTS

Affect sharing was inversely related to post-recognition cigarettes/day (B(SE) = -0.17(0.07), 95%C.I. -0.30,-0.04, p = .011) and moderated the relationship between pre-recognition smoking and post-recognition smoking consistent with a buffering effect (B(SE) = -.17(0.05); 95%C.I. - 0.28,-0.06; p = .002). Other empathy related processes showed neither direct nor interactive effects on smoking outcomes.

CONCLUSIONS

Further research is recommended to clarify the role of empathy in pregnancy smoking.

An Integrated Mechanistic Model of Mindfulness-Oriented Recovery Enhancement for Opioid-Exposed Mother-Infant Dyads

A growing body of neurobiological and psychological research sheds light on the mechanisms underlying the development and maintenance of opioid use disorder and its relation to parenting behavior. Perinatal opioid use is associated with risks for women and children, including increased risk of child maltreatment. Drawing from extant data, here we provide an integrated mechanistic model of perinatal opioid use, parenting behavior, infant attachment, and child well-being to inform the development and adaptation of behavioral interventions for opioid-exposed mother-infant dyads. The model posits that recurrent perinatal opioid use may lead to increased stress sensitivity and reward dysregulation for some mothers, resulting in decreased perceived salience of infant cues, disengaged parenting behavior, disrupted infant attachment, and decreased child well-being. We conclude with a discussion of Mindfulness-Oriented Recovery Enhancement as a means of addressing mechanisms undergirding perinatal opioid use, parenting, and attachment, presenting evidence on the efficacy and therapeutic mechanisms of mindfulness. As perinatal opioid use increases in the United States, empirically informed models can be used to guide treatment development research and address this growing concern.

The Value of Mechanistic Experiments to Target the Shared Neural Circuitry of Parenting and Addiction: The Potential for Video Feedback Interventions

Certain neural processes that underlie addiction are also central to parenting, notably stress and reward. Parenting interventions that incorporate the unique context of caregivers with addiction have demonstrated some success: However, real-world implementation of evidence-based interventions can be difficult with this population. Video feedback interventions are an especially promising approach to reach parents who experience barriers to participation, particularly caregivers with addiction. A translational neuroscientific approach to elucidating the mechanisms of change in these interventions will aid the delivery and success of this method and advance theory surrounding parenting in the context of addiction. Along these lines, we provide an example of one video feedback intervention, Filming Interactions to Nurture Development, that will serve as such a mechanistic experiment.

Parenting and addictions: Current insights from human neuroscience

Purpose

A growing body of human research has documented associations between the maternal brain and maternal substance use and addictions. This neuroscience-informed approach affords the opportunity to unpack potential neurobiological mechanisms that may underscore challenges in maternal caregiving behavior among mothers with addictions and provide new directions for parenting interventions.

Findings

Consistent with theoretical models of parenting and addictions, five studies evidence both hypo- and hyper-reactivity to infant affective cues across neuroimaging methods and tasks that incorporate both infant face and cry stimuli. Three structural and resting-state brain studies as a function of maternal substance use are also reported.

Conclusions

While human neuroimaging research converges in showing that maternal substance use is associated with differential reactivity to infant affective cues, further multi-level/multi-modal, longitudinal, and dimensional research is critically needed to advance this area of investigation.

Mothering from the Inside Out: Addressing the Intersection of Addiction, Adversity, and Attachment with Evidence-Based Parenting Intervention

Purpose of Review

Mothers with substance use disorders are often referred for parenting support, though commonly available programs may miss the mark for families impacted by addiction. This may be related to a lack of attention to children's emotional needs, mothers' histories of adversity, and the neurobiological differences seen in mothers with addictions. We review the implications of addiction, adversity, and attachment for parenting interventions. We then describe Mothering from the Inside Out (MIO), an evidence-based parenting intervention designed specifically for mothers with addictions.

Recent Findings

Evidence from clinical trials suggests that MIO improves outcomes for two generations: both mothers with addictions and their children. Recent trials demonstrate that MIO may be delivered effectively by community-based clinicians and may be beneficial for parents with other chronic stressors.

Summary

Addressing addiction, adversity, and attachment simultaneously may have a positive synergistic effect. Future research should study the implementation of MIO in real-world settings and examine the impact of MIO on maternal neurobiology.

Parsing alcohol-dependent mothers' insensitivity to child distress: Longitudinal links with children's affective and anxiety problems

Prior work suggests that substance-dependent mothers insensitively respond to their child's emotional needs, which can increase children's risk for psychopathology. However, the mechanisms and processes underlying these associations remain unclarified. Mothers' insensitivity to children's distress is an especially unique predictor of child maladjustment, yet no study has examined whether or how different types of insensitivity to child distress uniquely affect the development of internalizing problems in children of alcohol-dependent mothers. To bridge these gaps, this study examined longitudinal mediational pathways between maternal alcohol dependence symptoms, 2 types of maternal insensitivity to child distress (disengagement and intrusiveness), and 2 types of child internalizing symptoms (affective and anxiety problems) in a majority Black and Latinx sample of young children (Mage = 2.14 years) and their mothers. Results revealed that maternal disengagement mediated associations between maternal alcohol dependence symptoms and child internalizing problems such that alcohol dependence predicted increased disengagement to children's distress, which subsequently predicted increases in children's affective problems. Maternal alcohol dependence symptoms were not associated with intrusiveness to child distress; however, increased intrusiveness predicted later increases in child anxiety problems. Findings support a differentiated approach to studying maternal insensitivity to child distress, specifically indicating that mothers with alcohol dependence symptoms may be more or less likely to display certain types of insensitivity to child distress which may differentially influence children's risk for internalizing problems. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Neurobiology of peripartum mental illness

At least one in seven pregnant or recently postpartum women will experience a mental illness such as an anxiety disorder, depressive disorder, or substance use disorder. These mental illnesses have detrimental effects on the health of the mother, child, and family, but little is known about the hypothalamic and other neural correlates of maternal mental health concerns. The transition to parenthood alone is a time of remarkable neural plasticity, so it is perhaps not surprising that current research is showing that maternal mental illness has unique neural profiles. Furthermore, the neural systems affected by peripartum mental illness overlap and interact with the systems involved in maternal caregiving behaviors, and mother-infant interactions are, therefore, highly susceptible to disruption. This review discusses what we know about the unique neural changes occurring during peripartum mental illness and the role of the hypothalamus in these illnesses. With an improved understanding of the neural correlates of maternal mental health and disease, we will be better equipped to predict risk, develop effective treatments, and ultimately prevent suffering for millions of parents during this critical time in life.