Malak Sabrina M, Crowley Michael J, Mayes Linda C, Rutherford Helena J V
Yale Child Study Center, USA.
Yale Child Study Center, USA.
J Affect Disord. 2015 Feb 1;172:324-30. doi: 10.1016/j.jad.2014.10.013. Epub 2014 Oct 19.
Women may be especially vulnerable to anxiety during the postpartum period and early infancy. However, little is known regarding the potential impact of maternal anxiety on the neural processing of infant-relevant information.
In this ERP study, 47 recent mothers viewed neutral and distressed infant faces, concurrent with EEG collection. We examined the N170 as a perceptual marker of face processing and the late positive potential (LPP) as an index of engagement with stimulus processing. Mothers also completed the Spielberger State-Trait Anxiety Inventory.
While the N170 was unaffected by infant affect and anxiety levels, the LPP was greater in amplitude for distressed vs. neutral faces. Moreover, the degree of LPP amplitude elicited by neutral infant faces was positively correlated with state anxiety. There were no associations between anxiety and the LPP elicited by distressed infant faces.
We employed self-report measures of state and trait anxiety symptomatology and including diagnostic classification of anxiety disorders will be important in future research.
These results indicate that recent mothers with higher levels of state anxiety may be more engaged with processing neutral infant cues.
女性在产后和婴儿早期可能特别容易出现焦虑情绪。然而，关于母亲焦虑对与婴儿相关信息的神经加工的潜在影响，我们所知甚少。
在这项事件相关电位（ERP）研究中，47名刚分娩的母亲观看中性表情和痛苦表情的婴儿面孔，同时收集脑电图（EEG）。我们将N170作为面孔加工的知觉指标，将晚期正电位（LPP）作为参与刺激加工的指标。母亲们还完成了斯皮尔伯格状态-特质焦虑量表。
虽然N170不受婴儿情绪和焦虑水平的影响，但痛苦表情面孔的LPP波幅大于中性表情面孔。此外，中性表情婴儿面孔引发的LPP波幅程度与状态焦虑呈正相关。焦虑与痛苦表情婴儿面孔引发的LPP之间没有关联。
我们采用了状态和特质焦虑症状的自我报告测量方法，在未来研究中纳入焦虑症的诊断分类将很重要。
这些结果表明，状态焦虑水平较高的刚分娩母亲可能更专注于加工中性婴儿线索。
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