![]() ![]() Prior studies have linked the signal's different frequency bands-alpha, beta, theta, and delta waves- with different kinds of brain activity. But the EEG signal also contains other kinds of information about the brain. "What we were surprised by, in part, was how early in life we see this association."ĮEGs, available in most pediatric practices, measure brain electrical activity, and are usually used to diagnose or evaluate people with epilepsy. "The EEG has been found to be exquisitely sensitive to perturbations in the environment, and thus we are not entirely surprised to see an association between stress in a mother's life and her infant's brain activity," says Charles Nelson, Ph.D., director of the Laboratories of Cognitive Neuroscience at Boston Children's Hospital and the study's senior investigator. ![]()
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