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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
Published on: September 12, 2011
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Typical and atypical neurodevelopment for face specialization: an FMRI study.
Jane E Joseph1, Xun Zhu, Andrew Gundran
1Department of Neurosciences, Medical University of South Carolina, Clinical Sciences Building, Room 325E, MSC 616, Charleston, SC, 29425, USA, josep@musc.edu.
Journal of Autism and Developmental Disorders
|December 7, 2014
Summary
Autism spectrum disorder (ASD) and siblings show distinct face processing brain patterns compared to typically developed individuals. These differences suggest unique neural pathways and potential compensatory mechanisms in ASD and family members.
Area of Science:
- Neuroscience
- Developmental Psychology
- Autism Research
Background:
- Individuals with autism spectrum disorder (ASD) exhibit altered social cognition, including face processing.
- Family members of individuals with ASD often show subclinical traits, suggesting shared genetic or environmental influences.
- Understanding neural differences in face processing is crucial for identifying early biomarkers and intervention targets.
Purpose of the Study:
- To investigate age-related differences in brain activation during face viewing in children with ASD, their siblings (SIB), and typically developed (TD) controls.
- To identify distinct neural patterns of face specialization across these groups.
- To explore potential compensatory mechanisms in SIBs and atypical development in ASD.
Main Methods:
- Functional magnetic resonance imaging (fMRI) during a face-viewing task.
- Comparison of brain activation patterns in children aged 5-18 years.
- Analysis of face specialization in key brain regions, including the amygdala, prefrontal cortex, and fusiform gyrus.
Main Results:
- TD and SIB children demonstrated face specialization in the right amygdala and ventromedial prefrontal cortex.
- Face specialization increased with age in TD subjects in the left fusiform and right amygdala.
- SIBs exhibited unique antero-medial temporal lobe activation, potentially indicating compensation.
- ASD showed minimal face specialization, with increased right fusiform and decreased left amygdala activation with age, suggesting atypical frontal-amygdala-fusiform system development.
Conclusions:
- Face processing networks develop atypically in individuals with ASD.
- Siblings of individuals with ASD may employ compensatory neural strategies.
- Age-related changes in face processing circuitry differ significantly across TD, SIB, and ASD groups.
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