Genetic risk, not anesthesia exposure, impacts cognitive performance

A recent study of more than 2,000 identical twins found that medical problems early in life, rather than the neurotoxic effects of anesthesia, are likely linked to an individual's risk for developing learning disabilities. The study's findings, reported in the journal Twin Research and Human Genetics, contradict research published earlier this year, which concluded that receiving anesthesia younger than age four is associated with subsequent learning problems.

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