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An Analysis of the Relationship Between Complexity and Gait Adaptability

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dc.contributor.advisor Gage, William
dc.creator Kiriella, Jeevaka Bandara
dc.date.accessioned 2018-03-01T14:03:24Z
dc.date.available 2018-03-01T14:03:24Z
dc.date.copyright 2017-08-11
dc.date.issued 2018-03-01
dc.identifier.uri http://hdl.handle.net/10315/34351
dc.description.abstract The presented sequence of studies considers theoretical applications from Complexity Science and Chaos Theory for gait time-series analysis. The main goal of this research is to build on insights from a previous body of knowledge, which have identified measures derived from Complexity Science and Chaos Theory as critical markers of gait control. Specifically, the studies presented in this dissertation attempt to directly test whether characterizing gait complexity relates to an ability to flexibly adjust gait. The broader impact of this research is utilizing measures of complexity to characterize gait control, and as a tool for rehabilitation which have both gained momentum in fall prevention research. Through a series of four studies, this dissertation was designed to test the theoretical viewpoint that complexity is related to gait control, particularly gait adaptability. Firstly, I sought to develop a paradigm for reliably entraining gait complexity with the use of several auditory fluctuating timing imperatives which, differed based on specified fractal characteristics. I also sought to quantify the duration of the retention of gait complexity, following entrainment. Thirdly, I assessed whether attentional demands required during entrainment were affected by the fractal characteristics of a fluctuating timing imperative. Lastly, I applied the developed paradigm to evaluate the theoretical relationship between gait complexity and stepping performance. The findings from this dissertation have developed a framework for assessing gait control. This series of projects has determined that a fluctuating timing imperative can reliably prescribe the gait pattern of healthy individuals towards a particular complexity. The use of a fluctuating timing imperative leads to entrainment of the stimulus complexity. Furthermore, once the timing imperative has ceased, there is a brief period of complexity retention in the walking pattern. This dissertation has also confirmed that entraining complexity to a fluctuating timing imperative does not alter the attentional demands associated with entrainment. However, entraining gait to fluctuating timing imperatives of different complexities alters the stepping strategy that is adopted. Lastly, this dissertation has shown that synchronizing gait to a fixed-interval stimulus following entrainment, depends on the complexities of the gait pattern.
dc.language.iso en
dc.rights Author owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subject Health sciences
dc.title An Analysis of the Relationship Between Complexity and Gait Adaptability
dc.type Electronic Thesis or Dissertation
dc.degree.discipline Kinesiology & Health Science
dc.degree.name PhD - Doctor of Philosophy
dc.degree.level Doctoral
dc.date.updated 2018-03-01T14:03:24Z
dc.subject.keywords Fractals
dc.subject.keywords Complexity Science
dc.subject.keywords Variability
dc.subject.keywords Time series analysis
dc.subject.keywords Gait
dc.subject.keywords Adaptability
dc.subject.keywords Motor control
dc.subject.keywords Rehabilitation

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