Postural and Cortical Responses Following Visual Occlusion in Adults With and Without ASD.
Autistic adults may stand still, but their brains hustle harder when vision drops out.
01Research in Context
What this study did
Goh et al. (2018) watched adults with and without autism stand still while wearing a cap that records brain waves. The team covered each person’s eyes for short blinks to see how the brain and body kept balance.
They compared cortical activity and tiny body sway between the two groups.
What they found
Adults with autism kept their bodies steady, but their brains worked harder. When vision was blocked, they showed bigger cortical responses than neurotypical peers.
The extra brain effort suggests they need more neural fuel to stay upright when sight is taken away.
How this fits with other research
Lim et al. (2017) pooled 19 studies and saw large balance deficits in autism across all sensory tests. Leng’s adults looked stable on the surface, so the new data reveal the hidden cortical cost behind those earlier sway findings.
Doumas et al. (2016) also found bigger sway in autistic adults when sensory input was tricky. Leng extends that work by showing the brain, not the body, is where the main difference lives.
Ghanouni et al. (2017) showed faces wobble kids with autism more than objects. Leng used simple eye covers instead of social pictures, pointing to a broader visual-postural sensitivity in autism beyond social stimuli.
Why it matters
When you test balance, quiet body sway can fool you. Add a quick vision block and watch for delayed recovery or extra effort cues like toe gripping or facial tension. These signs may guide you to build visual-somatosensory drills that cut cognitive load and keep clients safer during daily transitions.
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02At a glance
03Original abstract
Autism is associated with differences in sensory processing and motor coordination. Evidence from electroencephalography suggests individual perturbation evoked response (PER) components represent specific aspects of postural disturbance processing; P1 reflects the detection and N1 reflects the evaluation of postural instability. Despite the importance of these cortical responses to postural control, PERs to a perturbation in adults with autism spectrum disorder (ASD) have yet to be reported. The aim was to compare PERs to visual perturbation under varied postural stability conditions in adults with and without ASD. This study is the first to report that while the assessment of postural set is intact, adults with ASD use more cortical resources to integrate and interpret visual perturbations for postural control.
Journal of autism and developmental disorders, 2018 · doi:10.1007/s10803-017-3405-9