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Visual attention affects late somatosensory processing in autism spectrum disorder
Haruka Noda1, Akiko Tokunaga1, Akira Imamura2
1Department of Occupational Therapy Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
The International Journal of Neuroscience
|November 23, 2020
Summary
Visual attention impacts later somatosensory processing in autism spectrum disorder (ASD). Individuals with ASD showed altered somatosensory evoked potentials (SEPs) when focusing on visual tasks, differing from typically developing individuals.
Area of Science:
- Neuroscience
- Developmental Psychology
- Sensory Processing
Background:
- Individuals with autism spectrum disorder (ASD) often exhibit somatosensory processing challenges.
- Abnormal integration of visual, tactile, and proprioceptive information is common in ASD.
- The influence of visual stimulation and attention on somatosensory processing in ASD is not well understood.
Purpose of the Study:
- To investigate the effects of visual attention on somatosensory processing in individuals with ASD.
- To compare neural activity in somatosensory areas between individuals with ASD and typically developing (TD) individuals under varying visual conditions.
Main Methods:
- Somatosensory evoked potentials (SEPs) were measured using median nerve stimulation.
- Participants (9 ASD, 9 TD) were tested under three conditions: eyes closed, eyes open, and focused visual attention.
- Data were analyzed using a 2-way analysis of variance to assess group and condition interactions.
Main Results:
- Significant interactions were found between group (ASD/TD) and condition for P100-N140 SEP amplitudes.
- Individuals with ASD exhibited larger P100-N140 amplitudes with eyes closed compared to TD individuals.
- In the ASD group, P100-N140 amplitudes were reduced during visual tasks compared to eyes closed or open conditions.
Conclusions:
- Visual attention modulates later stages of somatosensory processing in individuals with ASD.
- These findings highlight the complex interplay between visual attention and somatosensory processing in autism.
- Further research is needed to elucidate the neural mechanisms underlying these effects.
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