Widespread focal cortical alterations in autism spectrum disorder with intellectual disability detected by threshold-free cluster enhancement

V. E. Contarino, S. Bulgheroni, S. Annunziata, A. Erbetta, D. Riva

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND AND PURPOSE: In the past decades, a large body of work aimed at investigating brain structural anomalies accrued in autism spectrum disorder. Autism spectrum disorder is associated with intellectual disability in up to 50% of cases. However, only a few neuroimaging studies were conducted in autism spectrum disorder with intellectual disability, and none of them benefited from a nonsyndromic intellectual disability control group. MATERIALS AND METHODS: We performed a voxelwise investigation of the structural alterations in 25 children with autism spectrum disorder with intellectual disability by comparing them with 25 typically developing children and 25 nonsyndromic children with an intellectual disability. Besides a classic voxel-based morphometry statistical approach, the threshold-free cluster enhancement statistical approach was adopted. RESULTS: Classic voxel-based morphometry results did not survive family-wise error correction. The threshold-free cluster enhancement- based analysis corrected for family-wise error highlighted the following: 1) widespread focal cortical anomalies and corpus callosum alteration detected in autism spectrum disorder with intellectual disability; 2) basal ganglia and basal forebrain alteration detected both in autism spectrum disorder with intellectual disability and in nonsyndromic intellectual disability; and 3) differences in the frontocingulateparietal cortebetween autism spectrum disorder with intellectual disability and nonsyndromic intellectual disability. CONCLUSIONS: The present study suggests that the frontocingulate-parietal cortemay be the eligible key region for further investigations aiming at detecting imaging biomarkers in autism spectrum disorder with intellectual disability. The detection of structural alterations in neurodevelopmental disorders may be dramatically improved by using a threshold-free cluster enhancement statistical approach.

Original languageEnglish
Pages (from-to)1721-1726
Number of pages6
JournalAmerican Journal of Neuroradiology
Volume37
Issue number9
DOIs
Publication statusPublished - Sep 1 2016

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

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