Maternal psychological risk and the neural correlates of infant face processing: A latent profile analysis.

Maternal psychological factors, including anxiety, depression, and substance use, may negatively affect parenting. Previous works with mothers have often assessed each of these factors in isolation despite their frequent co-occurrence. Psychological factors have also been associated with neural processing of facial stimuli, specifically the amplitude (i.e., size) and latency (i.e., timing) of the face-specific N170 event-related potential. In the current study, 106 mothers completed measures assessing maternal psychological factors-anxiety, depression, and substance use. A latent profile analysis was used to identify profiles of psychological factors and assess profile associations with the N170 elicited by infant faces and with parental reflective functioning (PRF) as a measure related to caregiving. Two profiles (termed high and low psychological risk) were identified, with the higher risk profile associated with delayed N170 latency responses to infant faces. An exploratory analysis evidenced an indirect effect between the higher psychological risk profile and lower PRF through delayed N170 latency responses to infant faces. Taken together, maternal psychological risk across multiple indicators may together shape neural processing of infant faces, which may have downstream consequences for caregiving.

Racial disparities in EEG research and their implications for our understanding of the maternal brain.

Racial disparities in maternal health are alarming and persistent. Use of electroencephalography (EEG) and event-related potentials (ERPs) to understand the maternal brain can improve our knowledge of maternal health by providing insight into mechanisms underlying maternal well-being, including implications for child development. However, systematic racial bias exists in EEG methodology-particularly for Black individuals-and in psychological and health research broadly. This paper discusses these biases in the context of EEG/ERP research on the maternal brain. First, we assess the racial/ethnic diversity of existing ERP studies of maternal neural responding to infant/child emotional expressions, using papers from a recent meta-analysis, finding that the majority of mothers represented in this research are of White/European ancestry and that the racially and ethnically diverse samples that are present are limited in terms of geography. Therefore, our current knowledge base in this area may be biased and not generalizable across racially diverse mothers. We outline factors underlying this problem, beginning with the racial bias in EEG equipment that systematically excludes individuals of African descent, and also considering factors specific to research with mothers. Finally, we highlight recent innovations to EEG hardware to better accommodate diverse hairstyles and textures, and other important steps to increase racial and ethnic representativeness in EEG/ERP research with mothers. We urge EEG/ERP researchers who study the maternal brain-including our own research group-to take action to increase racial diversity so that this research area can confidently inform understanding of maternal health and contribute to minimizing maternal health disparities.

Nonverbal face-to-face interactions in macaques and humans: A translational pilot study.

Human and nonhuman primate mother-infant dyads engage in face-to-face interactions critical for optimal infant development. In semi-free-ranging rhesus macaques (Macaca mulatta), maternal primiparity and infant sex influence the expression of nonverbal face-to-face mother-infant interactions. However, whether similar patterns of variation exist in laboratory-housed macaques or human mothers is not well understood. Comparing both species would yield information regarding the translational validity of macaques to humans in this important social/developmental domain. In this pilot study, we first compared semi-free-ranging (n = 39) and laboratory-housed (n = 20) macaques, finding that laboratory-housed dyads, first-time mothers, and mothers of sons engaged in higher rates of face-to-face interactions regardless of housing. After translating the nonhuman primate coding scheme for use in a small but diverse group of human mother-infant dyads (N = 27; 44.4% African American, 18.5% American Indian, 7.4% Asian/Asian American, and 29.6% White), we found that, like macaques, human mothers of sons engaged in more face-to-face interactions; however, experienced (vs. first-time) mothers engaged in more interactions. Macaques and humans also engaged in species-specific interactions with their infants. We conclude that components of caregiver-infant nonverbal face-to-face interactions are translatable across human and nonhuman primate species and represent an exciting avenue for future caregiving work.

Adult attachment is related to maternal neural response to infant cues: an ERP study.

Maternal attachment security is an important predictor of caregiving . However, little is known regarding the neurobiological mechanisms by which attachment influences processing of infant cues, a critical component of caregiving. We examined whether attachment security, measured by the Adult Attachment Interview, might relate to neural responses to infant cues using event-related potentials. Secure (n=35) and insecure (n=24) mothers viewed photographs of infant faces and heard recordings of infant vocalizations while electroencephalography was recorded. We examined initial processing of infant faces (N170) and cries (N100), and attentional allocation to infant faces and cries (P300). Secure mothers were significantly faster than insecure mothers to orient to infant cries (N100), structurally encode their own infant's face (N170), and attend to infant faces (P300). These differences may elucidate mechanisms underlying how attachment may shape neural processing of infant cues and highlight the use ofsocial neuroscientific approaches in examining clinically relevant aspects of attachment.

Envisioning motherhood: Mental-state language in caregiving narratives across the perinatal period.

Nancy Suchman's work highlighted the fundamental role of maternal mentalization in maternal addiction, mental health, and caregiving challenges. In this study, we aimed to examine the role of mental-state language (MSL) as a measure of mentalization in prenatal and postnatal narratives and their sentiment in a sample of 91 primarily White mothers from the western United States, followed from the second trimester of pregnancy, through the third trimester, to 4 months postpartum. Specifically, we investigated the use of affective and cognitive MSL in prenatal narratives when mothers visualized caring for their baby and postnatal narratives when mothers compared their prenatal visualization to the current caregiving reality. Results indicated moderate consistency in MSL between the second and third trimesters, but prenatal and postnatal MSL was not significantly correlated. Across all time points, higher use of MSL was related to more positive sentiment, indicating an association between mentalization and positive caregiving representations across the perinatal period. Women used more affective than cognitive MSL in prenatal imagination of caregiving, but this pattern was reversed in their postpartum reflection. Implications on assessing parental mentalization prenatally and considering the relative dominance of affective and cognitive mentalizing are discussed while considering study limitations.

El trabajo de Nancy Suchman subrayó el papel fundamental de la mentalización maternal en la adicción materna, la salud mental y los retos de la prestación de cuidado. En este estudio, nos propusimos examinar el papel del lenguaje del estado mental como una medida de mentalización en las narrativas pre- y postnatales y su sentimiento en un grupo muestra de 91 madres primariamente blancas del oeste de los Estados Unidos, a quienes se les dio seguimiento a partir del segundo trimestre de embarazo, a través del tercer trimestre, hasta 4 meses después del parto. Específicamente, investigamos el uso de lenguaje del estado mental afectivo y cognitivo en las narrativas prenatales cuando las madres visualizaban el cuidado de su bebé, y las narrativas postnatales cuando las madres comparaban su visualización prenatal con la presente realidad de prestación de cuidado. Los resultados indicaron una consistencia moderada en el lenguaje del estado mental entre el segundo y tercer trimestres, pero el lenguaje del estado mental prenatal y postnatal no fue significativamente correlacionado. A los largo de todos los punto temporales, el más alto uso del lenguaje del estado mental se relacionó con un más positivo sentimiento, indicando así una asociación entre la mentalización y las representaciones positivas de la prestación de cuidado a lo largo del período perinatal. Las mujeres usaron más lenguaje del estado mental afectivo que cognitivo en la imaginación prenatal de la prestación de cuidado, pero este patrón se invirtió en sus reflexiones después del parto. Se discuten las implicaciones sobre el tener acceso a la mentalización del progenitor prenatalmente y considerar el relativo dominio del mentalizarse en lo afectivo y cognitivo, al tiempo que se consideran las limitaciones del estudio.

Le travail de Nancy Suchman a mis en lumière le rôle fondamental de la mentalisation maternelle dans l'addiction maternelle, la santé mentale et les défis de la prestation de soins. Dans cette étude nous nous sommes donné pour but d'examiner le rôle du langage d'état mental en tant que mesure de la mentalisation dans les narrations prénatales et postnatales et leur sentiment chez un échantillon de 91 mères dans l'ensemble blanches vivant dans l'ouest des Etats-Unis d'Amériques, et suivies du second trimestre de la grossesse, durant le troisième trimestre jusqu'à 4 mois après la naissance. Plus particulièrement nous nous sommes penchés sur l'utilisation du langage d'état mental affectif et cognitif dans des narrations prénatales lorsque les mères visualisaient les soins à leur bébé, et les narrations postnatales lorsque les mères comparaient leur visualisation prénatale à la réalité actuelle des soins au bébé. Les résultats ont indiqué une cohérence modérée dans le langage d'état mental entre les second et troisième trimestres mais le langage d'état mental prénatal et postnatal n'était pas significativement corrélé. Au travers de tous les points temporels l'utilisation plus grande de langage d'état mental était liée à un sentiment plus positif, indiquant un lien entre la mentalisation et les représentations positives des soins au travers de la période périnatale. Les femmes ont utilisé un langage d'état mentale plus affectif que cognitif dans l'imagination prénatale des soins, mais ce schéma était renversé dans leur réflexion postpartum. Les implications pour l'évaluation de la mentalisation parentale avant la naissance et pour la considération de la domination relative de la mentalisation affective et cognitive sont discutées, tout en considérant les limites de l'étude.

Emotion regulation during pregnancy: a call to action for increased research, screening, and intervention.

This paper serves as a call to action for increased focus on emotion regulation during pregnancy. We make this case by summarizing the limited research to date on this topic, which has demonstrated that emotion regulation in pregnant people has important mental health, caregiving, and developmental correlates throughout the perinatal period. Given its crosscutting and modifiable nature, bolstering emotion regulation during pregnancy has the potential for considerable intergenerational consequences, and it is critical to further investigate this construct.

The effects of prenatal stress on neural responses to infant cries in expectant mothers and fathers.

The perinatal period is characterized by distinct neurobiological and psychological changes initiated prenatally, which may both facilitate postpartum caregiving and increase vulnerability to stress. Parents need to adapt to the high demands of caregiving, which include responding to salient infant cues, such as infant cries. Therefore, assessing the impact of prenatal stress exposure on parents' neural processing of infant cries may elucidate mechanisms conferring early risk for detrimental perinatal outcomes. Using event-related potentials, we examined whether prenatal perceived stress affected neural markers of perceptual (N1, P2) and attentional (LPP) processes elicited by high- and low-distress infant cries in expectant mothers (n = 38) and fathers (n = 30). Results evidenced that prenatal perceived stress impacted parents' sustained attentional processing (LPP) of infant cries, but not early perceptual responses (N1, P2). Specifically, higher levels of prenatal perceived stress were associated with a greater LPP response to low-distress, but not high-distress, infant cries. There were no parental sex differences in prenatal perceived stress or neural responses to infant cries. Increased attentional processing of low-distress cries in highly stressed parents may reflect uncertainty regarding infant distress level, thereby requiring more attentional resources. Overall, our results suggest that prenatal stress impacts processing of infant cues, even before birth.

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.

Se asocia el uso materno de sustancias con la actividad neural alterada y el débil resultado en los hijos, lo cual pudiera ser favorecido por una prestación de cuidado subóptima en forma de un impedido funcionamiento con reflexión (PRF) en el progenitor. Para investigar estas asociaciones, se examinó la fuerza de la electroencefalografía frontal en estado de descanso de 48 madres que usaban sustancia y 37 madres que no usaban sustancias, especificando siete bandas de frecuencia: delta, theta, alpha, alpha 1, alpha 2, beta y gamma. Las madres que usaban sustancias mostraron una fuerza espectral aumentada en beta y gamma, tal como se les comparó con las madres que no usaban sustancias, lo que potencialmente refleja estados más altos de agitación en las madres que usaban sustancias. No se dieron diferencias entre grupos en ninguno de los componentes de PRF (v.g. niveles de pre-mentalización, opacidad e interés y curiosidad). Los análisis de todas las muestras revelaron correlaciones positivas significativas entre pre-mentalización y la fuerza espectral delta. Tomándolos en conjunto, estos resultados indican posibles correlaciones neurales entre del uso materno de sustancias y PRF, lo cual aporta un importante próximo paso para examinar las asociaciones entre el uso materno de sustancias y los débiles resultados en el niño.

La toxicomanie maternelle est liée à une activité neuronale altérée et de mauvais résultats sur les enfants de la personne, ce qui peut être facilité par un mode de soin suboptimal sous la forme d'un fonctionnement de réflexion parentale (PRF en anglais) altéré. Pour enquêter sur ces liens, l'électroencéphalographie frontale au repos (EEG) de 48 mères toxicomanes et de 37 mères non-toxicomanes a été examiné, plus spécifiquement sur quatre bandes de fréquences : delta, thêta, alpha, alpha1, alpha2, béta, et gamma. Les mères toxicomanes ont fait preuve d'une puissance spectrale de béta et gamma importante comparées aux mères non-toxicomanes, ce qui reflète peut-être de plus d' états d'excitation chez les mères toxicomanes. Nous n'avons observé aucune différence entre les groupes pour ce qui concerne les composantes de la PRF (soit, niveaux de pré-mentalisation, d'opacité, d'intérêt et de curiosité). Des analyses sur tout l'échantillon ont révélé des corrélations positives importantes entre la puissance spectrale de pré-mentalisation et la puissance spectrale delta. Considérés dans l'ensemble, ces résultats suggèrent un corrélat neural potentiel de la toxicomanie maternelle et de la PRF, ce qui présente une nouvelle étape importante dans l'examen des liens entre la toxicomanie maternelle et les mauvais résultats sur l'enfant.

The Application of Connectome-Based Predictive Modeling to the Maternal Brain: Implications for Mother-Infant Bonding.

Maternal bonding early postpartum lays an important foundation for child development. Changing brain structure and function during pregnancy and postpartum may underscore maternal bonding. We employed connectome-based predictive modeling (CPM) to measure brain functional connectivity and predict self-reported maternal bonding in mothers at 2 and 8 months postpartum. At 2 months, CPM predicted maternal anxiety in the bonding relationship: Greater integration between cerebellar and motor-sensory-auditory networks and between frontoparietal and motor-sensory-auditory networks were associated with more maternal anxiety toward their infant. Furthermore, greater segregation between the cerebellar and frontoparietal, and within the motor-sensory-auditory networks, was associated with more maternal anxiety regarding their infant. We did not observe CPM prediction of maternal bonding impairments or rejection/anger toward the infant. Finally, considering 2 and 8 months of data, changes in network connectivity were associated with changes in maternal anxiety in the bonding relationship. Our results suggest that changing connectivity among maternal brain networks may provide insight into the mother-infant bond, specifically in the context of anxiety and the representation of the infant in the mother's mind. These findings provide an opportunity to mechanistically investigate approaches to enhance the connectivity of these networks to optimize the representational and behavioral quality of the caregiving relationship.

Substance use and mothers' neural responses to infant cues.

Substance use may influence mothers' responsiveness to their infants and negatively impact the parent-infant relationship. Maternal substance use may co-opt neural circuitry involved in caregiving, thus reducing the salience of infant cues and diminishing the sense of reward experienced by caring for infants. Gaps in understanding exist with regard to the mechanisms by which substance use operates to influence mothers' processing of infant cues and how this translates to caregiving. Therefore, we examined how substance use might relate to maternal neural responses to infant cues using event-related potentials (ERPs). Substance-using (n = 29) and nonsubstance-using (n = 29) mothers viewed photographs of infant faces and heard recordings of infant vocalizations while electroencephalography was recorded simultaneously. Three specific ERP components were used to examine initial processing of infant faces (N170) and cries (N100), and attentional allocation to infant faces and cries (P300). Substance-using mothers did not discriminate facial affect at early encoding stages (N170), were generally slower to orient to infant cries (N100), showed heightened responses to neutral faces (P300), and failed to adaptively differentiate between high-distress versus low-distress cries (P300). These differences may be important to caregiving behaviors associated with the formation of mother-child attachment. Implications are discussed, as are limitations and future directions.

EEG captures affective touch: CT-optimal touch and neural oscillations.

Tactile interactions are of developmental importance to social and emotional interactions across species. In beginning to understand the affective component of tactile stimulation, research has begun to elucidate the neural mechanisms that underscore slow, affective touch. Here, we extended this emerging body of work and examined whether affective touch (C tactile [CT]-optimal speed), as compared to nonaffective touch (non-CT-optimal speed) and no touch conditions, modulated EEG oscillations. We report an attenuation in alpha and beta activity to affective and nonaffective touch relative to the no touch condition. Further, we found an attenuation in theta activity specific to the affective, as compared to the nonaffective touch and no touch conditions. Similar to theta, we also observed an attenuation of beta oscillations during the affective touch condition, although only in parietal scalp sites. Decreased activity in theta and parietal-beta ranges may reflect attentional-emotional regulatory mechanisms; however, future work is needed to provide insight into the potential neural coupling between theta and beta and their specific role in encoding slow, tactile stimulation.

Mothers with substance addictions show reduced reward responses when viewing their own infant's face.

Maternal addiction constitutes a major public health problem affecting children, with high rates of abuse, neglect, and foster care placement. However, little is known about the ways in which substance addiction alters brain function related to maternal behavior. Prior studies have shown that infant face cues activate similar dopamine-associated brain reward regions to substances of abuse. Here, we report on a functional MRI study documenting that mothers with addictions demonstrate reduced activation of reward regions when shown reward-related cues of their own infants. Thirty-six mothers receiving inpatient treatment for substance addiction were scanned at 6 months postpartum, while viewing happy and sad face images of their own infant compared to those of a matched unknown infant. When viewing happy face images of their own infant, mothers with addictions showed a striking pattern of decreased activation in dopamine- and oxytocin-innervated brain regions, including the hypothalamus, ventral striatum, and ventromedial prefrontal cortex-regions in which increased activation has previously been observed in mothers without addictions. Our results are the first to demonstrate that mothers with addictions show reduced activation in key reward regions of the brain in response to their own infant's face cues. Hum Brain Mapp 38:5421-5439, 2017. © 2017 Wiley Periodicals, Inc.

Maternal Emotion Regulation Strategies, Internalizing Problems and Infant Negative Affect.

Recent work has identified links between mothers' self-regulation and emotion regulation (ER) and children's social-emotional outcomes. However, associations between maternal ER strategies (e.g., reappraisal, suppression), known to influence internalizing problems in adults, and children's negative affect (NA) have not been considered. In the current study, the direct and indirect relationships, through maternal internalizing problems, between maternal use of ER strategies and infant NA are examined. The potential effects of infant NA on maternal internalizing difficulties are also considered. Ninety-nine mothers and their infants participated across three time points during the first year postpartum. Higher maternal suppression was indirectly related to higher infant NA, through maternal internalizing problems; lower maternal reappraisal also was indirectly related to higher infant NA through maternal internalizing problems. Infant NA at four months postpartum was related to mothers' internalizing problems 6 months postpartum. The implications of these findings for future research and intervention are discussed.

Tobacco Smoking and the Resting Maternal Brain: A Preliminary Study of Frontal EEG.

Tobacco smoking has been attributed to a wide range of detrimental health consequences for both women and their children. In addition to its known physical health effects, smoking may also impact maternal neural responses and subsequent caregiving behavior. To begin investigating this issue, we employed electroencephalography (EEG) to examine resting neural oscillations of tobacco-smoking mothers (n = 35) and non-smoking mothers (n = 35). We examined seven EEG frequency bands recorded from frontal electrode sites (delta, theta, alpha, alpha1, alpha2, beta, and gamma). While no between-group differences were present in high-frequency bands (alpha2, beta, gamma), smokers showed greater spectral power in low-frequency bands (delta, theta, alpha, alpha1) compared to non-smokers. This increased power in low-frequency bands of tobacco-smoking mothers is consistent with a less aroused state and may be one mechanism through which smoking might affect the maternal brain and caregiving behavior.

A Preliminary Review of Whether Prior Reproductive Experience Influences Caregiving.

The transition to parenthood marks a significant developmental period for the mother. Clinical and preclinical studies evidence neural and hormonal changes that support maternal behavior that is critical to infant survival and development. These changes suggest marked plasticity as a result of reproduction in the mother. Furthermore, multiple reproductive experiences may contribute to long-lasting changes to support more efficient and competent caregiving with subsequent pregnancies and births. However, less is known about neural, hormonal, and behavioral changes that occur as a function of parity-the number of children a woman has. Here, we highlight behavioral, neural, and hormonal changes that occur as women transition to parenthood, with a special emphasis on parity-related changes. Limitations and directions for future research are discussed, as well as clinical implications to be considered in light of parity research.

Investigating Maternal Brain Structure and its Relationship to Substance Use and Motivational Systems.

Substance use during pregnancy and the postpartum period may have significant implications for both mother and the developing child. However, the neurobiological basis of the impact of substance use on parenting is less well understood. Here, we examined the impact of maternal substance use on cortical gray matter (GM) and white matter (WM) volumes and whether this was associated with individual differences in motivational systems of behavioral activation and inhibition. Mothers were included in the substance-using group if any addictive substance was used during pregnancy and/or in the immediate postpartum period (within 3 months of delivery). GM volume was reduced in substance-using mothers compared to non-substance-using mothers, particularly in frontal brain regions. In substance-using mothers, we also found that frontal GM was negatively correlated with levels of behavioral activation (i.e., the motivation to approach rewarding stimuli). This effect was absent in non-substance-using mothers. Taken together, these findings indicate a reduction in GM volume is associated with substance use and that frontal GM volumetric differences may be related to approach motivation in substance-using mothers.

Here's looking at you, kid: attention to infant emotional faces in mothers and non-mothers.

Infant facial cues play a critical role in eliciting care and nurturance from an adult caregiver. Using an attentional capture paradigm we investigated attentional processing of adult and infant emotional facial expressions in a sample of mothers (n = 29) and non-mothers (n = 37) to determine whether infant faces were associated with greater task interference. Responses to infant target stimuli were slower than adult target stimuli in both groups. This effect was modulated by parental status, such that mothers compared to non-mothers showed longer response times to infant compared to adult faces. Both groups also responded more slowly to emotional faces, an effect that was more marked for infant emotional faces. Finally, it was found that greater levels of mothers' self-reported parental distress was associated with less task interference when processing infant faces. These findings indicate that for adult women, infant faces in general and emotional infant faces in particular, preferentially engage attention compared to adult faces. However, for mothers, infant faces appear to be more salient in general. Therefore, infant faces may constitute a special class of social stimuli. We suggest that alterations in attentional processing in motherhood may constitute an adaptive behavioural change associated with becoming a parent.

Kin rejection: social signals, neural response and perceived distress during social exclusion.

Across species, kin bond together to promote survival. We sought to understand the dyadic effect of exclusion by kin (as opposed to non-kin strangers) on brain activity of the mother and her child and their subjective distress. To this end, we probed mother-child relationships with a computerized ball-toss game Cyberball. When excluded by one another, rather than by a stranger, both mothers and children exhibited a significantly pronounced frontal P2. Moreover, upon kin rejection versus stranger rejection, both mothers and children showed incremented left frontal positive slow waves for rejection events. Children reported more distress upon exclusion than their own mothers. Similar to past work, relatively augmented negative frontal slow wave activity predicted greater self-reported ostracism distress. This effect, generalized to the P2, was limited to mother- or child-rejection by kin, with comparable magnitude of effect across kin identity (mothers vs. children). For both mothers and children, the frontal P2 peak was significantly pronounced for kin rejection versus stranger rejection. Taken together, our results document the rapid categorization of social signals as kin relevant and the specificity of early and late neural markers for predicting felt ostracism.

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.

Protective role of parenthood on age-related brain function in mid- to late-life.

The experience of parenthood can profoundly alter one's body, mind, and environment, yet we know little about the long-term associations between parenthood and brain function and aging in adulthood. Here, we investigate the link between number of children parented (parity) and age on brain function in 19,964 females and 17,607 males from the UK Biobank. In both females and males, increased parity was positively associated with functional connectivity, particularly within the somato/motor network. Critically, the spatial topography of parity-linked effects was inversely correlated with the impact of age on functional connectivity across the brain for both females and males, suggesting that a higher number of children is associated with patterns of brain function in the opposite direction to age-related alterations. These results indicate that the changes accompanying parenthood may confer benefits to brain health across the lifespan, highlighting the importance of future work to understand the associated mechanisms.