Nonlinear analysis of the effects of vision and postural threat on upright stance

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dc.contributor.advisorCleworth, Taylor
dc.contributor.authorWeinberg, Sara Elizabeth
dc.date.accessioned2022-12-14T16:41:05Z
dc.date.available2022-12-14T16:41:05Z
dc.date.copyright2022-09-23
dc.date.issued2022-12-14
dc.date.updated2022-12-14T16:41:04Z
dc.degree.disciplineKinesiology & Health Science
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractThe ability to control and maintain upright stance is crucial for humans to interact with their surroundings, allowing humans to navigate through environments. Behaviour during upright stance was examined using nonlinear methods to provide additional insight into postural threat (height) effects on postural control. Linear methods fail to address the nonstationary behaviour of the human body, while a nonlinear approach considers the underlying dynamics of postural sway. Linear measures identified increases in amplitude at 3.2 m (HIGH) compared to ground level (LOW), but no change with eyes closed (EC). Nonlinear measures identified decreases in all recurrence quantification analysis (RQA) variables in the HIGH and EC condition. The changes in sway dynamics might represent increased randomness and adaptability in response to increased fear (HIGH) or decreased sensory information (EC). This study demonstrates how including an RQA could provide a more informative analysis than linear measures alone.
dc.identifier.urihttp://hdl.handle.net/10315/40767
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectKinesiology
dc.subject.keywordsBalance
dc.subject.keywordsNonlinear
dc.subject.keywordsRecurrence quantification analysis
dc.subject.keywordsPostural threat
dc.subject.keywordsFear
dc.subject.keywordsVision
dc.titleNonlinear analysis of the effects of vision and postural threat on upright stance
dc.typeElectronic Thesis or Dissertation

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