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Related Concept Videos

Autism Spectrum Disorder01:19

Autism Spectrum Disorder

792
Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
792
Personality Disorders: Schizotypal and Histrionic01:20

Personality Disorders: Schizotypal and Histrionic

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Schizotypal personality disorder and histrionic personality disorder are two distinct psychological conditions classified under personality disorders, each characterized by unique behavioral patterns and social difficulties. Both disorders significantly affect interpersonal relationships and emotional well-being, leading to social isolation and frustration.
Schizotypal Personality Disorder: Eccentric Behavior and Social Withdrawal
Schizotypal personality disorder is marked by odd or eccentric...
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Cortical signatures in behaviorally clustered autistic traits subgroups: a population-based study.

Angeline Mihailov1, Cathy Philippe2, Arnaud Gloaguen2,3

  • 1Neurospin, Institut Joliot, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France. Angeline.MIHAILOV@cea.fr.

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Autism spectrum disorder (ASD) heterogeneity obscures biomarkers. This study identified three distinct ASD trait subgroups using clustering, revealing unique brain structure differences in each subtype, not in a combined group.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Genetics

Background:

  • Autism spectrum disorder (ASD) presents significant heterogeneity, complicating biomarker discovery and leading to inconsistent research findings.
  • Homogenizing ASD subtypes is crucial for understanding underlying biological mechanisms and improving diagnostic and therapeutic strategies.

Purpose of the Study:

  • To identify distinct subgroups within the autism spectrum disorder (ASD) population based on behavioral dimensions.
  • To investigate neuroimaging differences, specifically cortical features, between identified ASD subgroups and controls.

Main Methods:

  • Unsupervised clustering analysis was performed on behavioral data from 1093 participants (aged 6-18, IQ ≥ 70) from the "Healthy Brain Network" cohort.
  • Structural MRI data from 527 participants were analyzed for cortical thickness, gyrification, and surface area, with adjustments for site effects, age, gender, and IQ.
  • Statistical comparisons were made between a combined heterogeneous ASD group and controls, and between each identified subgroup and controls.

Main Results:

  • Clustering revealed three distinct ASD trait subgroups: high emotional dysfunction, high ADHD-like traits, and high anxiety/depressive symptoms.
  • No significant neuroimaging differences were found when comparing a combined heterogeneous ASD group against controls.
  • Unique cortical signatures (thickness, gyrification, surface area) were identified in each of the three individual ASD trait subgroups compared to controls.

Conclusions:

  • The findings support the existence of distinct ASD subtypes, underscoring the limitations of treating ASD as a monolithic condition.
  • Applying dimensional approaches to deconstruct ASD heterogeneity is essential for uncovering meaningful biological differences and advancing research.
  • Identifying specific ASD subtypes can pave the way for more targeted research and potentially personalized interventions.