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Impaired Brain Function in Premature Infants May Begin in the Womb

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Highlights
  • Even before birth, premature babies display alteration in the regions of their developing brain.
  • Preterm infants are known to have brain changes in language regions.

Impaired Brain Function in Premature Infants May Begin in the Womb

Premature babies may display alterations in the circuitry of their developing brains, even before they are born, according to a first-of-its kind research study by Yale School of Medicine researchers and their colleagues at the National Institutes of Health (NIH) and Wayne State University.

In America, 10% to 11% percent of babies are born prematurely. This new study suggest that factors contributing to early birth might also impact the brain's development in the womb, leading to significant neurodevelopmental disorders, such as autism, attention deficit hyperactivity disorder, and cerebral palsy.

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In the study, Yale School of Medicine researchers Laura Ment, M.D., Dustin Scheinost, and R. Todd Constable collaborated closely with principal investigator Moriah Thomason of Wayne State University, and Roberto Romero, M.D., chief of the Perinatology Research Branch and Program Director for Obstetrics and Maternal-Fetal Medicine of NICHD/NIH.

The research team used fetal resting-state functional magnetic resonance imaging to measure brain connectivity in utero in 32 human fetuses with normal brain anatomy, 14 of which were subsequently delivered preterm (between 24 and 35 weeks).
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Patients were studied at Wayne State and Scheinost, assistant professor in the Magnetic Resonance Research Center at Yale School of Medicine, spearheaded the analysis using novel functional magnetic resonance imaging strategies to detect differences in neural networks between study groups.

"It was striking to see brain differences associated with preterm birth many weeks before the infants were prematurely-born," said Scheinost. "Preterm infants are known to have brain changes in language regions, and we were particularly surprised that the fetal differences we detected were in these same language regions."

The team found that systems-level neural connectivity was weaker in fetuses that would subsequently be born preterm. The findings were localized in left-hemisphere, pre-language regions of the brain.

Co-author Ment said these findings suggest that some prematurely born infants show changes in neural systems prior to birth. "Impaired connectivity in language regions in infants born long before their due dates needs further study, but is important for future research into both the causes and outcomes of preterm birth," said Ment, professor of pediatrics and neurology at Yale School of Medicine.

The team's future research will focus on potential causes of prematurity, such as infection and inflammation, to determine whether and how those conditions influence brain development in utero. They also will follow the study participants' children to establish long-term outcomes.

Reference
  1. Thomason, M. E. et al,Weak functional connectivity in the human fetal brain prior to preterm birth, Scientific Reports (2017) doi:10.1038/srep39286.


Source: Medindia

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