Journal article
Speed, resistance, and unexpected accelerations modulate feed forward and feedback control during a novel weight bearing task
Gait & posture, Vol.52, pp.345-353
02/2017
DOI: 10.1016/j.gaitpost.2016.12.015
PMCID: PMC5337176
PMID: 28043056
Abstract
We developed a method to investigate feed-forward and feedback movement control during a weight bearing visuomotor knee tracking task. We hypothesized that a systematic increase in speed and resistance would show a linear decrease in movement accuracy, while unexpected perturbations would induce a velocity-dependent decrease in movement accuracy. We determined the effects of manipulating the speed, resistance, and unexpected events on error during a functional weight bearing task. Our long term objective is to benchmark neuromuscular control performance across various groups based on age, injury, disease, rehabilitation status, and/or training. Twenty-six healthy adults between the ages of 19-45 participated in this study. The study involved a single session using a custom designed apparatus to perform a single limb weight bearing task under nine testing conditions: three movement speeds (0.2, 0.4, and 0.6Hz) in combination with three levels of brake resistance (5%, 10%, and 15% of individual's body weight). Individuals were to perform the task according to a target with a fixed trajectory across all speeds, corresponding to a∼0 (extension) to 30° (flexion) of knee motion. An increase in error occurred with speed (p<0.0001, effect size (eta
): η
=0.50) and resistance (p<0.0001, η
=0.01). Likewise, during unexpected perturbations, the ratio of perturbed/non-perturbed error increased with each increment in velocity (p<0.0014, η
=0.08), and resistance (p<0.0001, η
=0.11). The hierarchical framework of these measurements offers a standardized functional weight bearing strategy to assess impaired neuro-muscular control and/or test the efficacy of therapeutic rehabilitation interventions designed to influence neuromuscular control of the knee.
Details
- Title: Subtitle
- Speed, resistance, and unexpected accelerations modulate feed forward and feedback control during a novel weight bearing task
- Creators
- Shih-Chiao Tseng - Department of Physical Therapy & Rehabilitation Science, University of Iowa Carver College of Medicine, 1-252 MEB, Iowa City, IA, 52242, United StatesKeith R Cole - Department of Physical Therapy & Rehabilitation Science, University of Iowa Carver College of Medicine, 1-252 MEB, Iowa City, IA, 52242, United StatesMichael A Shaffer - Department of Physical Therapy & Rehabilitation Science, University of Iowa Carver College of Medicine, 1-252 MEB, Iowa City, IA, 52242, United StatesMichael A Petrie - Department of Physical Therapy & Rehabilitation Science, University of Iowa Carver College of Medicine, 1-252 MEB, Iowa City, IA, 52242, United StatesChu-Ling Yen - Department of Physical Therapy & Rehabilitation Science, University of Iowa Carver College of Medicine, 1-252 MEB, Iowa City, IA, 52242, United StatesRichard K Shields - Department of Physical Therapy & Rehabilitation Science, University of Iowa Carver College of Medicine, 1-252 MEB, Iowa City, IA, 52242, United States. Electronic address: richard-shields@uiowa.edu
- Resource Type
- Journal article
- Publication Details
- Gait & posture, Vol.52, pp.345-353
- DOI
- 10.1016/j.gaitpost.2016.12.015
- PMID
- 28043056
- PMCID
- PMC5337176
- NLM abbreviation
- Gait Posture
- ISSN
- 0966-6362
- eISSN
- 1879-2219
- Publisher
- England
- Grant note
- R01 HD039445 / NICHD NIH HHS R01 HD062507 / NICHD NIH HHS R01 HD082109 / NICHD NIH HHS
- Language
- English
- Date published
- 02/2017
- Academic Unit
- Orthopedics and Rehabilitation; Physical Therapy and Rehabilitation Science
- Record Identifier
- 9984047875302771
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