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On the Reliability of Wearable Sensors for Assessing Movement Disorder-Related Gait Quality and Imbalance: A Case Study of Multiple Sclerosis.

Record Type:	Electronic resources : Monograph/item
Title/Author:	On the Reliability of Wearable Sensors for Assessing Movement Disorder-Related Gait Quality and Imbalance: A Case Study of Multiple Sclerosis./
Author:	Diaz Hernandez, Steven.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
Description:	135 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-10, Section: B.
Contained By:	Dissertations Abstracts International83-10B.
Subject:	Computer science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29064402
ISBN:	9798426817098

On the Reliability of Wearable Sensors for Assessing Movement Disorder-Related Gait Quality and Imbalance: A Case Study of Multiple Sclerosis.
Diaz Hernandez, Steven.

On the Reliability of Wearable Sensors for Assessing Movement Disorder-Related Gait Quality and Imbalance: A Case Study of Multiple Sclerosis. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 135 p.

Source: Dissertations Abstracts International, Volume: 83-10, Section: B.

Thesis (Ph.D.)--University of South Florida, 2022.

This item must not be sold to any third party vendors.

Approximately 33 million American adults had a movement disorder associated with medication use, ear infections, injury, or neurological disorders in 2008, with over 18 million people affected by neurological disorders worldwide. Physical therapists assist people with movement disorders by providing interventions to reduce pain, improve mobility, avoid surgeries, and prevent falls and secondary complications of neurodegenerative disorders. Current gait assessments used by physical therapists, such as the Multiple Sclerosis Walking Scale, provide only semi-quantitative data, and cannot assess walking quality in detail or describe how one's walking quality changes over time. As a result, quantitative systems have grown as useful tools for measuring and evaluating movement disorders, particularly to track an individual's gait.A variety of quantitative systems are used to analyze the spatiotemporal parameters of gait. These include video motion capture systems, walkway systems with embedded pressure activated sensors, and body worn inertial sensors. Since walkway systems and video motion capture systems are limited to clinic or research settings and cannot gather data in the individual's natural setting, body worn and handheld inertial sensors are increasingly favored by researchers, clinicians, and patients themselves to assess daily step activity. Similarly, in this dissertation, we evaluate wearable sensor-based methodologies to assess gait quality and balance, particularly in individuals diagnosed with Multiple Sclerosis (MS).This dissertation consists of three key research objectives. First, we investigate performance, step count and segmentation differences between movement-capturing sensors embedded in smartphones and standalone, wearable inertial measurement units (wIMUs) for gait assessment. We, then, propose novel methods to estimate step length and width and for processing raw signals gathered from wIMUs. Finally, we demonstrate the reliability of wIMUs for gait analysis in MS against a gold standard walkway system.Our methodology takes advantage of signal processing and machine learning techniques for analyzing wIMUs' signals and converting these raw signals into practical significance. Using the intra-class correlation coefficient (ICC) to measure consistency, and the mean difference to measure the between-method difference of our proposed methods with existing methods in wIMU software algorithms, the proposed methods showed excellent consistency (ICC > 0.98) when measuring multiple gait spatiotemporal parameters, such as step time, cadence, gait velocity, and step length. We also show that the consistency of gait measurement by wIMUs during both comfortable and fast speed trials were not affected by MS, asserting the use of wearable devices in clinical trials.

ISBN: 9798426817098Subjects--Topical Terms:

523869
Computer science.
Subjects--Index Terms:

Gait analysis

On the Reliability of Wearable Sensors for Assessing Movement Disorder-Related Gait Quality and Imbalance: A Case Study of Multiple Sclerosis.
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245 1 0 $a On the Reliability of Wearable Sensors for Assessing Movement Disorder-Related Gait Quality and Imbalance: A Case Study of Multiple Sclerosis.
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300 $a 135 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-10, Section: B.
500 $a Advisor: Neal, Tempestt J.
502 $a Thesis (Ph.D.)--University of South Florida, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a Approximately 33 million American adults had a movement disorder associated with medication use, ear infections, injury, or neurological disorders in 2008, with over 18 million people affected by neurological disorders worldwide. Physical therapists assist people with movement disorders by providing interventions to reduce pain, improve mobility, avoid surgeries, and prevent falls and secondary complications of neurodegenerative disorders. Current gait assessments used by physical therapists, such as the Multiple Sclerosis Walking Scale, provide only semi-quantitative data, and cannot assess walking quality in detail or describe how one's walking quality changes over time. As a result, quantitative systems have grown as useful tools for measuring and evaluating movement disorders, particularly to track an individual's gait.A variety of quantitative systems are used to analyze the spatiotemporal parameters of gait. These include video motion capture systems, walkway systems with embedded pressure activated sensors, and body worn inertial sensors. Since walkway systems and video motion capture systems are limited to clinic or research settings and cannot gather data in the individual's natural setting, body worn and handheld inertial sensors are increasingly favored by researchers, clinicians, and patients themselves to assess daily step activity. Similarly, in this dissertation, we evaluate wearable sensor-based methodologies to assess gait quality and balance, particularly in individuals diagnosed with Multiple Sclerosis (MS).This dissertation consists of three key research objectives. First, we investigate performance, step count and segmentation differences between movement-capturing sensors embedded in smartphones and standalone, wearable inertial measurement units (wIMUs) for gait assessment. We, then, propose novel methods to estimate step length and width and for processing raw signals gathered from wIMUs. Finally, we demonstrate the reliability of wIMUs for gait analysis in MS against a gold standard walkway system.Our methodology takes advantage of signal processing and machine learning techniques for analyzing wIMUs' signals and converting these raw signals into practical significance. Using the intra-class correlation coefficient (ICC) to measure consistency, and the mean difference to measure the between-method difference of our proposed methods with existing methods in wIMU software algorithms, the proposed methods showed excellent consistency (ICC > 0.98) when measuring multiple gait spatiotemporal parameters, such as step time, cadence, gait velocity, and step length. We also show that the consistency of gait measurement by wIMUs during both comfortable and fast speed trials were not affected by MS, asserting the use of wearable devices in clinical trials.
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650 4 $a Computer engineering. $3 621879
650 4 $a Physical therapy. $3 588713
650 4 $a Physiology. $3 518431
650 4 $a Neurosciences. $3 588700
650 4 $a Pathology. $3 643180
653 $a Gait analysis
653 $a Movement disorder
653 $a Sensor reliability
653 $a Walking quality
653 $a Wearable sensors
653 $a Multiple Sclerosis
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690 $a 0464
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710 2 $a University of South Florida. $b Computer Science and Engineering. $3 1682850
773 0 $t Dissertations Abstracts International $g 83-10B.
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791 $a Ph.D.
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793 $a English
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