Abstract
Neural oscillatory anomalies in autism spectrum disorders (ASD) suggest an excitatory/inhibitory imbalance; however, the nature and clinical relevance of these anomalies are unclear. Whole-cortex magnetoencephalography data were collected while 50 children (27 with ASD, 23 controls) underwent an eyes-closed resting-state exam. A Fast Fourier Transform was applied and oscillatory activity examined from 1 to 120 Hz at 15 regional sources. Associations between oscillatory anomalies and symptom severity were probed. Children with ASD exhibited regionally specific elevations in delta (1–4 Hz), theta (4–8 Hz), alpha (8–12 Hz), and high frequency (20–120 Hz) power, supporting an imbalance of neural excitation/inhibition as a neurobiological feature of ASD. Increased temporal and parietal alpha power was associated with greater symptom severity and thus is of particular interest.
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Acknowledgments
This study was supported in part by NIH grants R01DC008871 and R01DC008871-02S1 (TR) and T32NS007413 (LC). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Neurological Disorders and Stroke or the National Institutes of Health. This research was also supported in part by grants from the Nancy Lurie Marks Family Foundation, the Jeffrey and Christina Lurie Family Foundation, Autism Speaks, and the Pennsylvania Department of Health. The Pennsylvania Department of Health specifically disclaims responsibility for any analyses, interpretations or conclusions. The authors thank the children and families who participated; Katelyn Cannon, John Dell, Sarah Khan, Peter Lam, Justin Monroe, and Jamie Rundio for their help with data collection; Saba Qasmieh for her help with participant recruitment; and Susan E. Levy and Gregory Miller for clinical insights and helpful discussions. Dr. Roberts gratefully acknowledges the Oberkircher Family for the Oberkircher Family Chair in Pediatric Radiology at Children’s Hospital of Philadelphia.
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Cornew, L., Roberts, T.P.L., Blaskey, L. et al. Resting-State Oscillatory Activity in Autism Spectrum Disorders. J Autism Dev Disord 42, 1884–1894 (2012). https://doi.org/10.1007/s10803-011-1431-6
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DOI: https://doi.org/10.1007/s10803-011-1431-6