A Study of the Correlation between VEP and Clinical Severity in Children with Autism Spectrum Disorder

Area of Science:

• Neuroscience
• Developmental Psychology
• Clinical Audiology

Background:

• Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by social communication deficits and repetitive behaviors.
• Visual evoked potential (VEP) is a non-invasive neurophysiological tool to assess the integrity of the visual pathway.
• Understanding visual pathway function in young children with ASD is crucial for early diagnosis and intervention.

Purpose of the Study:

• To investigate neural transmission in the visual pathway of preschool children with ASD using VEP.
• To compare VEP parameters between children with ASD and age-matched typically developing controls.
• To explore correlations between VEP findings and clinical measures of ASD severity.

Main Methods:

• Pattern-reversal VEP using checkerboard stimuli was administered to preschool children (3-5 years) with ASD and controls.
• Clinical severity of ASD was assessed using the Autism Treatment Evaluation Checklist (ATEC) and Vineland Adaptive Behavior Scales (VABS-II).
• Statistical analyses were performed to compare VEP latencies and correlate them with clinical scores.

Main Results:

• Children with ASD exhibited significantly prolonged N145 latency compared to controls.
• Longer N145 latency was associated with higher ATEC scores in the sensory/cognitive subdomain.
• Slower N145 responses correlated with lower VABS-II scores in the socialization domain.

Conclusions:

• Delayed N145 latency in VEP suggests impaired neural communication in preschool children with ASD.
• VEP parameters, particularly latency, show potential as objective biomarkers for assessing ASD severity.
• These findings support the utility of VEP in conjunction with clinical assessments for a comprehensive evaluation of ASD.