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Children’s family income is associated with cognitive function and volume of anterior not posterior hippocampus
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Children’s family income is associated with cognitive function and volume of anterior not posterior hippocampus
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Journal Article
Children’s family income is associated with cognitive function and volume of anterior not posterior hippocampus
2020
Overview
Children from lower income backgrounds tend to have poorer memory and language abilities than their wealthier peers. It has been proposed that these cognitive gaps reflect the effects of income-related stress on hippocampal structure, but the empirical evidence for this relationship has not been clear. Here, we examine how family income gaps in cognition relate to the anterior hippocampus, given its high sensitivity to stress, versus the posterior hippocampus. We find that anterior (but not posterior) hippocampal volumes positively correlate with family income up to an annual income of ~$75,000. Income-related differences in the anterior (but not posterior) hippocampus also predicted the strength of the gaps in memory and language. These findings add anatomical specificity to current theories by suggesting a stronger relationship between family income and anterior than posterior hippocampal volumes and offer a potential mechanism through which children from different income homes differ cognitively.
The hippocampus is thought to underlie income gaps in children’s cognition. Here, the authors find that the stress-sensitive anterior (but not posterior) hippocampus mediates income-gaps in memory and vocabulary, especially in children whose families earn ≤$75k annually.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
