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dc.contributor.authorShafer, Robin L.
dc.contributor.authorWang, Zheng
dc.contributor.authorBartolotti, James
dc.contributor.authorMosconi, Matthew W.
dc.date.accessioned2021-12-03T19:21:53Z
dc.date.available2021-12-03T19:21:53Z
dc.date.issued2021-09-08
dc.identifier.citationShafer, R.L., Wang, Z., Bartolotti, J. et al. Visual and somatosensory feedback mechanisms of precision manual motor control in autism spectrum disorder. J Neurodevelop Disord 13, 32 (2021). https://doi.org/10.1186/s11689-021-09381-2en_US
dc.identifier.urihttp://hdl.handle.net/1808/32244
dc.description.abstractBackground Individuals with autism spectrum disorder (ASD) show deficits processing sensory feedback to reactively adjust ongoing motor behaviors. Atypical reliance on visual and somatosensory feedback each have been reported during motor behaviors in ASD suggesting that impairments are not specific to one sensory domain but may instead reflect a deficit in multisensory processing, resulting in reliance on unimodal feedback. The present study tested this hypothesis by examining motor behavior across different visual and somatosensory feedback conditions during a visually guided precision grip force test.

Methods Participants with ASD (N = 43) and age-matched typically developing (TD) controls (N = 23), ages 10–20 years, completed a test of precision gripping. They pressed on force transducers with their index finger and thumb while receiving visual feedback on a computer screen in the form of a horizontal bar that moved upwards with increased force. They were instructed to press so that the bar reached the level of a static target bar and then to hold their grip force as steadily as possible. Visual feedback was manipulated by changing the gain of the force bar. Somatosensory feedback was manipulated by applying 80 Hz tendon vibration at the wrist to disrupt the somatosensory percept. Force variability (standard deviation) and irregularity (sample entropy) were examined using multilevel linear models.

Results While TD controls showed increased force variability with the tendon vibration on compared to off, individuals with ASD showed similar levels of force variability across tendon vibration conditions. Individuals with ASD showed stronger age-associated reductions in force variability relative to controls across conditions. The ASD group also showed greater age-associated increases in force irregularity relative to controls, especially at higher gain levels and when the tendon vibrator was turned on.

Conclusions Our findings that disrupting somatosensory feedback did not contribute to changes in force variability or regularity among individuals with ASD suggests a reduced ability to integrate somatosensory feedback information to guide ongoing precision manual motor behavior. We also document stronger age-associated gains in force control in ASD relative to TD suggesting delayed development of multisensory feedback control of motor behavior.
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dc.publisherBMCen_US
dc.rights© The Author(s). 2021. This work is licensed under a Creative Commons Attribution 4.0 International License.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.titleVisual and somatosensory feedback mechanisms of precision manual motor control in autism spectrum disorderen_US
dc.typeArticleen_US
kusw.kuauthorShafer, Robin L.
kusw.kuauthorBartolotti, James
kusw.kuauthorMosconi, Matthew W.
kusw.kudepartmentLife Span Instituteen_US
kusw.kudepartmentKansas Center for Autism Research and Training (K-CART)en_US
kusw.kudepartmentClinical Child Psychology Programen_US
dc.identifier.doi10.1186/s11689-021-09381-2en_US
dc.identifier.orcidhttps://orcid.org/ 0000-0002-1981-6777en_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US
dc.identifier.pmidPMC8427856en_US
dc.rights.accessrightsopenAccessen_US


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© The Author(s). 2021. This work is licensed under a Creative Commons Attribution 4.0 International License.
Except where otherwise noted, this item's license is described as: © The Author(s). 2021. This work is licensed under a Creative Commons Attribution 4.0 International License.