Abstract
The medial prefrontal cortex (mPFC) and the right temporo-parietal junction (rTPj) are highly involved in social understanding, a core area of impairment in autism spectrum disorder (ASD). We used fMRI to investigate sex differences in the neural correlates of social understanding in 27 high-functioning adults with ASD and 23 matched controls. There were no differences in neural activity in the mPFC or rTPj between groups during social processing. Whole brain analysis revealed decreased activity in the posterior superior temporal sulcus in males with ASD compared to control males while processing social information. This pattern was not observed in the female sub-sample. The current study indicates that sex mediates the neurobiology of ASD, particularly with respect to processing social information.
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Acknowledgments
Peter G. Enticott is supported by a Career Development Grant from the NHMRC. Paul B. Fitzgerald is supported by a NHMRC Practitioner Fellowship. Matthew E. Hughes is supported by the National Imaging Facility (NIF). We thank Mr Richard Nibbs for his assistance with data acquisition. We also thank the participants for volunteering their time to be involved in this study.
Author Contributions
Melissa Kirkovski contributed to the study design, data collection and analysis, interpretation of results, preparation and revision of the manuscript. Peter G. Enticott contributed to the study design, interpretation of results, oversaw the study and contributed to the manuscript. Matthew E. Hughes assisted with data analysis and contributed to the manuscript. Susan L. Rossell assisted with the study design and contributed to the manuscript. Paul B. Fitzgerald contributed to the study design, interpretation of results, oversaw the study and contributed to the manuscript. All authors have read and approve the final manuscript.
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PF has received equipment for research from MagVenture A/S, Medtronic Ltd, Cervel Neurotech and Brainsway Ltd and funding for research from Cervel Neurotech. Remaining authors declare that they have no conflict of interest.
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Kirkovski, M., Enticott, P.G., Hughes, M.E. et al. Atypical Neural Activity in Males But Not Females with Autism Spectrum Disorder. J Autism Dev Disord 46, 954–963 (2016). https://doi.org/10.1007/s10803-015-2639-7
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DOI: https://doi.org/10.1007/s10803-015-2639-7