Maternal depression influences infant speech development

By Liam Davenport, medwireNews Reporter

The early development of speech perception in infants is affected by both maternal depression and prenatal exposure to serotonin reuptake inhibitors (SRIs), such that major milestones are either accelerated or delayed, say US and Canadian scientists.

Janet Werker (University of British Columbia, Vancouver, Canada) who led the study commented: "This study is among the first to show how maternal depression and its treatment can change the timing of language development in babies.

"At this point, we do not know if accelerating or delaying these milestones in development has lasting consequences on later language acquisition, or if alternate developmental pathways exist. We aim to explore these and other important questions in future studies."

In order to examine the timing and precision of speech perception milestones, the team tested auditory discrimination of non-native Hindi consonant speech sound and the visual discrimination of the change from one language to another while watching silent talking faces at ages 6 and 10 months in 32 infants of SRI-treated depressed mothers, 21 infants of non-SRI-treated prenatally depressed mothers, and 32 control infants.

Control infants demonstrated the expected pattern of language discrimination, in which they showed a sensitivity to non-native language information at 6 months, followed by a significant decline in performance on each task by 10 months, the team notes in the Proceedings of the National Academy of Sciences.

By contrast, the expected failure to discriminate non-native vowel and visual language at 6 months continued at 10 months in SRI-exposed infants, while infants born to mothers with depression had unreliable discrimination at 6 months, with a preference for familiarity over novelty that led to reliable discrimination of non-native speech at 10 months.

A further experiment involved 36-week-old fetuses of 14 mothers taking SRI medications during pregnancy and 20 fetuses of nonexposed mothers, which tested their ability to discriminate between vowel and consonant sounds by measuring changes in heart rate. This revealed that, while control fetuses were able to discriminate vowel, but not consonant, sounds, SRI-exposed fetuses were able to discriminate both vowel and consonant sounds.

The team writes: "The results support an accelerated timing of perceptual attunement in SRI- exposed infants… Interestingly, maternal depression had the opposite effect."

Licensed from medwireNews with permission from Springer Healthcare Ltd. ©Springer Healthcare Ltd. All rights reserved. Neither of these parties endorse or recommend any commercial products, services, or equipment.

Comments

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment
Post

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

You might also like...
Brain-stimulation therapy at home reduces major depression symptoms