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Experts, but not novices, exhibit StartReact indicating experts use the reticulospinal system more than novices

Brandon M. Bartels, Maria Jose Quezada, Vengateswaran J. Ravichandran, View ORCID ProfileClaire F. Honeycutt
doi: https://doi.org/10.1101/841791
Brandon M. Bartels
1School of Biological and Health Systems Engineering, Arizona State University, 501Tyler Mall PO Box 879709, 502Tempe, Az 85287, United States of America
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Maria Jose Quezada
1School of Biological and Health Systems Engineering, Arizona State University, 501Tyler Mall PO Box 879709, 502Tempe, Az 85287, United States of America
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Vengateswaran J. Ravichandran
1School of Biological and Health Systems Engineering, Arizona State University, 501Tyler Mall PO Box 879709, 502Tempe, Az 85287, United States of America
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Claire F. Honeycutt
1School of Biological and Health Systems Engineering, Arizona State University, 501Tyler Mall PO Box 879709, 502Tempe, Az 85287, United States of America
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  • ORCID record for Claire F. Honeycutt
  • For correspondence: claire.honeycutt@asu.edu
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Abstract

Motor skill acquisition utilizes a wide array of neural structures; however, few articles evaluate how the relative contributions of these structures shift over the course of learning. Recent evidence from rodents and songbirds suggests there is a transfer from cortical to subcortical structures following intense, repetitive training. Evidence from humans indicate that the reticulospinal system is modulated over the course of skill acquisition and may be a subcortical facilitator of learning. The objective of this study was to evaluate how reticulospinal contributions are modulated by task expertise. Reticulospinal contributions were assessed using StartReact (SR). We hypothesized that expert typists would show SR during an individuated, keystroke task but SR would be absent in novices. Expert (75.2 ± 9.8 WPM) and novice typists (41.6 ± 8.2 WPM) were evaluated during an individuated, keystroke movements. In experts, SR was present in all fingers (except the middle) but was absent in novices (except the little). Together, these results suggest that experts use reticulospinal contributions more for movement than novices indicating that the reticular formation becomes increasingly important for movement execution in highly trained, skilled tasks even those that require individuated movement of the fingers.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted November 14, 2019.
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Experts, but not novices, exhibit StartReact indicating experts use the reticulospinal system more than novices
Brandon M. Bartels, Maria Jose Quezada, Vengateswaran J. Ravichandran, Claire F. Honeycutt
bioRxiv 841791; doi: https://doi.org/10.1101/841791
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Experts, but not novices, exhibit StartReact indicating experts use the reticulospinal system more than novices
Brandon M. Bartels, Maria Jose Quezada, Vengateswaran J. Ravichandran, Claire F. Honeycutt
bioRxiv 841791; doi: https://doi.org/10.1101/841791

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