[Neurobiological Markers of Autism Spectrum Disorders in Infancy]

Area of Science:

• Neurodevelopmental Disorders
• Pediatric Neurology
• Autism Spectrum Disorder Research

Background:

• Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by social communication impairments.
• Identifying early indicators is crucial for timely intervention and support.
• Current research focuses on subtle, early-manifesting signs beyond core diagnostic criteria.

Purpose of the Study:

• To systematically review recent studies on the earliest detectable symptoms of autism spectrum disorders.
• To explore the relationship between early attention and executive function deficits and later ASD manifestations.
• To discuss the role of attention impairments in the development of social deficits in ASD.

Main Methods:

• Systematic literature review of recent studies on early autism symptoms.
• Analysis of research focusing on perceptual and attentional abnormalities.
• Examination of studies investigating executive control deficits in young children.

Main Results:

• The earliest identified features of ASD include difficulties with attention disengagement and orientation to novel stimuli.
• Perceptual abnormalities in the magnocellular visual pathway are significant early indicators.
• Executive control deficits are prominent early signs, potentially linked to hyperactivity.

Conclusions:

• Attention disengagement and orientation impairments are primary early signs of autism spectrum disorder.
• Early executive control deficits may precede or co-occur with hyperactivity symptoms.
• Understanding these early markers is key to advancing ASD diagnosis and intervention strategies.