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Atypical brain circuits may cause slower gaze shifting in infants who later develop autism
Date:3/19/2013

s with autism and their families."

The study included 97 infants: 16 high-risk infants later classified with an autism spectrum disorder (ASD), 40 high-risk infants not meeting ASD criteria (i.e., high-risk-negative) and 41 low-risk infants. For this study, infants participated in an eye-tracking test and a brain scan at 7 months of age a clinical assessment at 25 months of age.

The results showed that the high-risk infants later found to have ASD were slower to orient or shift their gaze (by approximately 50 miliseconds) than both high-risk-negative and low-risk infants. In addition, visual orienting ability in low-risk infants was uniquely associated with a specific neural circuit in the brain: the splenium of the corpus callosum. This association was not found in infants later classified with ASD.

The study concluded that atypical visual orienting is an early feature of later emerging ASD and is associated with a deficit in a specific neural circuit in the brain.


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Contact: Tom Hughes
tahughes@unch.unc.edu
919-966-6047
University of North Carolina Health Care
Source:Eurekalert  

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