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How kids' brain structures grow as memory develops
Date:4/16/2014

st 25 percent of the children, within a few months either side of 14, did the sizes of all three regions decrease.

When they tested the children for memory performance, children with a larger CA3/dentate gyrus tended to perform better, they found. The work was published online March 15 by the journal Neuroimage.

In a related study in collaboration with the laboratory of Professor Silvia Bunge at UC Berkeley, published March 27 in Cerebral Cortex, the researchers also demonstrated how white matter connections projecting from the hippocampus to the brain cortex are related to memory function in children.

"White matter" tracts connect the prefrontal and parietal regions of the brain cortex, which control how we pay attention to things and engage in memory strategies, with the media-temporal lobe, the area that includes the hippocampus.

In the study, children performed a memory test that prompted them either to actively memorize an item and therefore engage the prefrontal and parietal cortices or to view an image passively. The ability to successfully modulate attention was linked to development of white matter tracts linking the prefrontal and parietal cortex tothe mediatemporal lobe, Ghetti said, but not to fronto-parietal connections.

Lead author on the paper is UC Berkeley researcher Carter Wendelken, with coauthors Lee, Bunge and Ghetti as well as Jacqueline Pospisil, Marcos Sastre and Julia Ross, all at UC Davis. It's part of a large collaborative study of memory function and brain growth in children, lead by Ghetti and Bunge, and funded by the National Institutes of Health. The study will look at the development of in a cohort of children from age eight to 14 years.


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Contact: Andy Fell
ahfell@ucdavis.edu
530-752-4533
University of California - Davis
Source:Eurekalert  

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