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Measuring visual electrophysiological responses in individuals with low-functioning autism: a feasibility and pilot
Kyongje Sung1,2, Hanna Glazer1, Jessica O'Grady1
1Department of Neurology, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Meyer 2-147, Baltimore, Maryland, 21287, USA.
Pilot and Feasibility Studies
|January 15, 2022
Summary
A new visual evoked potential method successfully tested individuals with low-functioning autism (LFA). This study identified delayed cortical responses and absent prestimulus alpha activity as potential electrophysiological markers in LFA.
Area of Science:
- Neuroscience
- Autism Spectrum Disorders Research
- Visual Electrophysiology
Background:
- Visual abnormalities are common in autism spectrum disorders (ASD).
- Electrophysiological markers for visual processing in ASD remain elusive.
- Methodological challenges hinder studies in individuals with low-functioning autism (LFA).
Purpose of the Study:
- To test a tailored visual evoked potential (VEP) paradigm for feasibility in individuals with LFA.
- To explore differences in VEP patterns between individuals with LFA, high-functioning autism (HFA), and typical development.
- To identify potential electrophysiological markers of visual processing in LFA.
Main Methods:
- A hybrid VEP paradigm combining passive visual stimuli and an attention-maintaining behavioral task was used.
- Scalp-recorded evoked responses were analyzed.
- Visual evoked response patterns were compared across LFA, HFA, and typical development groups.
Main Results:
- The VEP paradigm proved feasible for individuals with LFA, yielding measurable cortical responses.
- Individuals with LFA exhibited longer cortical response latencies compared to HFA and typical development groups.
- Absence of prestimulus alpha activity in the LFA group may serve as a potential electrophysiological marker.
Conclusions:
- Tailored visual electrophysiology paradigms enhance the inclusion of individuals with LFA in research.
- This approach facilitates broader investigation of visual processing across the autism spectrum.
- The findings support the utility of adapted methods for studying neurodevelopmental conditions.
