Face processing in mothers is linked to mother-infant social communication, which is critical for parenting and in turn for child development. Neuroimaging studies of child maltreatment-exposed (CME) mothers are sparse compared to studies of mothers with postpartum depression, which have suggested blunted amygdala reactivity to infant stimuli. We expected to see a similar pattern in CME mothers. Based on broader studies in trauma-exposed populations, we anticipated increased amygdala reactivity to negative adult face stimuli in a comparison task in CME mothers given heightened evaluation of potential threat. We examined Neuroimaging studies of mothers with childhood maltreatment exposure (CME) (18-37 years old), who performed infant (N = 45) and/or adult (N = 46) face processing tasks. CME mothers exhibited blunted bilateral amygdala reactivity to infant faces. There was no between-group difference in amygdala reactivity to adult faces. In infant and adult face processing tasks regardless of CME, superior temporal gyrus activation was increased for negative-valence stimuli. Our preliminary findings suggest that childhood maltreatment alters maternal processing of infant social cues, a critical skill impacting infant socioemotional development.

译文

母亲的面部加工与母婴社交交流有关,这对于育儿以及儿童发展至关重要。与产后抑郁症母亲的研究相比,暴露于儿童虐待 (CME) 母亲的神经影像学研究很少,后者表明杏仁核对婴儿刺激的反应性减弱。我们希望在CME母亲中看到类似的模式。基于对创伤暴露人群的更广泛研究,我们预计在CME母亲的一项比较任务中,杏仁核对成人面部负面刺激的反应性增加,并对潜在威胁进行了高度评估。我们检查了儿童虐待暴露 (CME) (18-37岁) 母亲的神经影像学研究,这些母亲执行婴儿 (N =   45) 和/或成人 (N =   46) 面部处理任务。CME母亲对婴儿面部的双侧杏仁核反应性减弱。杏仁核对成人面部的反应性没有组间差异。在婴儿和成人面部处理任务中,无论CME如何,对于负价刺激,上颞叶回的激活都会增加。我们的初步发现表明,儿童期虐待会改变母亲对婴儿社交线索的处理,这是影响婴儿社会情感发展的一项关键技能。

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