Postural and Cortical Responses Following Visual Occlusion in Adults With and Without ASD
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.
KeywordsASD Perturbation evoked response Postural control Postural disturbance Vision Sensory integration
The authors would like to acknowledge the input of Mr. Paul Davey in developing the software and integrating the hardware for the study and also Dr. Lee Wee Lih for helping with the ERP processing and analysis of the research study.
KLG, SM and TT designed the experiment. KLG performed the experiments, analysed the data and wrote the Material and Methods sections. KLG, SM and RP performed the statistical analyses. AR contributed with expertise in sensory systems and balance disorder throughout the design and in writing the introduction and discussion/implementations sections together with KLG, SM and TT. The final editing was completed jointly by all five authors. The order of authors has been agreed upon among them and the corresponding author, KLG has taken due care and full responsibility of this matter.
Compliance with Ethical Standards
Conflict of interest
All authors declare that they have no conflict of interest.
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