Detecting Gait Imbalance Following Concussion Using an Inertial Measurement Unit
| dc.contributor.advisor | Chou, Li-Shan | |
| dc.contributor.author | Pitt, William | |
| dc.date.accessioned | 2020-02-27T22:32:27Z | |
| dc.date.available | 2020-02-27T22:32:27Z | |
| dc.date.issued | 2020-02-27 | |
| dc.description.abstract | Concussion injury is shown to result in acutely impaired dynamic balance control. This impairment can last as long as two months post injury as evidenced by biomechanical metrics derived from data collected during dual-task (DT) gait using camera-based motion capture system. However, clinical application of such DT gait balance control with advanced kinematic analysis is yet limited. To advance the clinical translation of the laboratory findings to clinical practice, four studies were conducted to assess the utility of an inertial measurement unit (IMU) to detect gait imbalance following concussion. In the first study, a highly consistent and reliable DT assessment was developed using off the shelf hardware and software. Acceleration based kinematic markers collected from a single IMU placed over the fifth lumbar vertebra (L5) demonstrated potential for detecting subtle changes in gait balance control at a university sport medicine facility. In the second study the DT gait balance control of individuals sustaining an acute concussion was analyzed with the assessment and compared to that of healthy matched controls over a two month post injury period. Multiple-gait event specific accelerations and angular velocities collected from the L5 sensor were capable of detecting impaired gait balance control. In the third study, logistic regression models including groups of between three and six kinematic and neurocognitive metrics collected from both straight and turning gait were shown to have high sensitivity (Sn) and specificity (Sp) in distinguishing acutely concussed from healthy individuals. Furthermore, these models maintained moderate Sn and Sp throughout the two month post injury period suggesting they are capable of identifying individuals with lingering balance control deficits. In the fourth study, the utility of dual-task cost (DTC) metrics derived from the kinematic and neurocognitive measures was assessed for post-concussion gait imbalance detection. It was determined that due to high levels of variability inherent to the metrics in this application, their utility in gait imbalance detection is limited, and are similarly unable to be used to describe differences or changes in task prioritization. This dissertation includes co-authored work either previously published or unpublished. | en_US |
| dc.identifier.uri | https://hdl.handle.net/1794/25238 | |
| dc.language.iso | en_US | |
| dc.publisher | University of Oregon | |
| dc.rights | All Rights Reserved. | |
| dc.title | Detecting Gait Imbalance Following Concussion Using an Inertial Measurement Unit | |
| dc.type | Electronic Thesis or Dissertation | |
| thesis.degree.discipline | Department of Human Physiology | |
| thesis.degree.grantor | University of Oregon | |
| thesis.degree.level | doctoral | |
| thesis.degree.name | Ph.D. |
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