Does a bigger brain make for a smarter child in babies born prematurely?

New research suggests the growth rate of the brain's cerebral cortex in babies born prematurely may predict how well they are able to think, speak, plan and pay attention later in childhood. The research is published in the October 12, 2011, online issue of Neurology, the medical journal of the American Academy of Neurology. The cerebral cortex is the outer layer of the brain covering the cerebrum, and is responsible for cognitive functions, such as language, memory, attention and thought.

"In babies born preterm, the more the cerebral cortex grows early in life the better children perform complex tasks when they reach six years old," said study author A. David Edwards, DSc, of Imperial College in London. "The period before a full-term birth is critical for . Problems occurring at this time have long-term consequences, and it appears that preterm birth affects brain growth."

The study looked at rates of 82 infants who were born before 30 weeks gestational age using MRI scans of their brain between 24-44 weeks. were collected repeatedly from immediately after the babies were born until their full-term due date. Their cognitive abilities were tested at two years old and again at six years old.

The study found that the faster the rate of cerebral cortex growth in infancy, the higher their scores were on the developmental and intelligence tests as children. A five to 10 percent reduction in the surface area of the cerebral cortex at full-term age predicted approximately one standard deviation lower score on the intelligence tests in later childhood. Motor skills were not correlated with the rate of growth, and the overall was not related to general cognitive ability.

"These findings show we should focus on the growth of specific regions of the brain like the cortex when trying to understand or diagnose potential problems in babies and fetuses," said Edwards.

Related Stories

Recommended for you

Team finds an off switch for pain

55 minutes ago

In research published in the medical journal Brain, Saint Louis University researcher Daniela Salvemini, Ph.D. and colleagues within SLU, the National Institutes of Health (NIH) and other academic institutions have d ...

Brain researchers pinpoint gateway to human memory

2 hours ago

An international team led by researchers of the University of Magdeburg and the DZNE has successfully determined the location, where memories are generated with a level of precision never achieved before. ...

How various brain areas interact in decisions

5 hours ago

Our decisions can be pictured in the brain. Scientists at the University of Zurich were able to show in a recent study which areas are most active in decision making. Often the so-called prefrontal cortex ...

Researchers identify receptors activated by odors

7 hours ago

A group of physiologists led by University of Kentucky's Tim McClintock have identified the receptors activated by two odors using a new method that tracks responses to smells in live mice.

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.