{"693630":{"#nid":"693630","#data":{"type":"event","title":"PhD Defense by   Joelle Dick","body":[{"value":"\u003Cp\u003EIn partial fulfillment of the requirements for the degree of\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EDoctor of Philosophy in Applied Physiology\u003C\/p\u003E\u003Cp\u003EIn the\u003C\/p\u003E\u003Cp\u003ESchool of Biological Sciences\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EJoelle Dick\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EWill defend her dissertation\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EMANAGING REDUNDANCY FOR STABLE TASK PERFORMANCE UNDER CONSTRAINTS\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EFriday, November 6th, 2026\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003E12:00 PM\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EApplied Physiology Building (555 14th\u0026nbsp;St.), Room 1253\u003C\/p\u003E\u003Cp\u003E\u003Ca href=\u0022https:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_OTcxMjIzN2EtNmNmZC00ZTBjLThjYmMtNGViNTAyZGQ4MGE5%40thread.v2\/0?context=%7b%22Tid%22%3a%22482198bb-ae7b-4b25-8b7a-6d7f32faa083%22%2c%22Oid%22%3a%2271cfe44b-7ef1-41c5-975b-94a51d6e6a86%22%7d\u0022\u003ETeams\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003Cstrong\u003EThesis Advisor:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EYoung-Hui Chang, Ph.D.\u003C\/p\u003E\u003Cp\u003ESchool of Biological Sciences\u003C\/p\u003E\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003ELewis Wheaton, Ph.D.\u003C\/p\u003E\u003Cp\u003ESchool of Biological Sciences\u003C\/p\u003E\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EBoris Prilutsky, Ph.D.\u003C\/p\u003E\u003Cp\u003ESchool of Biological Sciences\u003C\/p\u003E\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EGreg Sawicki, Ph.D.\u003C\/p\u003E\u003Cp\u003ESchools of Mechanical Engineering and Biological Sciences\u003C\/p\u003E\u003Cp\u003EGeorgia Institute of Technology\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003EColin Grove, Ph.D.\u003C\/p\u003E\u003Cp\u003EDepartment of Rehabilitation Medicine\u003C\/p\u003E\u003Cp\u003EEmory University School of Medicine\u003C\/p\u003E\u003Cp\u003EABSTRACT:\u003C\/p\u003E\u003Cp\u003EHuman movement requires the nervous system to use motor and sensory redundancy to maintain stability and achieve task-specific goals. This redundancy provides flexibility to adapt movement strategies in response to changing internal, mechanical, and environmental constraints. Understanding how the nervous system uses this flexibility to maintain task performance is essential for understanding motor coordination and adaptation.\u003C\/p\u003E\u003Cp\u003EThis dissertation investigates how the nervous system organizes movement variability and joint coordination in response to three distinct constraints: neuromuscular fatigue, increasing running speed, and altered gravity. Using uncontrolled manifold analysis and system identification techniques, three studies examine how changing task demands influence joint-level coordination and the stabilization of task-relevant variables.\u003C\/p\u003E\u003Cp\u003EThe first study investigated running speed in non-amputees and unilateral transtibial amputee sprinters, showing that runners without a prosthesis shift from interjoint toward individual joint coordination at higher speeds, whereas runners with a prosthesis relied more on interjoint covariation. The second study examined lower-limb coordination during repetitive squatting revealing that \u0026nbsp;kinematic coordination remained relatively consistent as fatigue progressed. \u0026nbsp;The third study examined postural control following simulated hypogravity adaptation, revealing a significant reduction in whole-body center of mass sway without significant changes in joint moment variability or relative ankle-to-hip contributions.\u003C\/p\u003E\u003Cp\u003ETogether, these findings suggest that the nervous system responds to changing physiological, mechanical, and environmental constraints by adjusting movement coordination and control. This dissertation highlights the importance of interpreting movement variability in relation to task-specific goals and provides insight into how the human motor system uses redundancy and flexible coordination strategies to maintain performance across diverse conditions.\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EMANAGING REDUNDANCY FOR STABLE TASK PERFORMANCE UNDER CONSTRAINTS\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"MANAGING REDUNDANCY FOR STABLE TASK PERFORMANCE UNDER CONSTRAINTS"}],"uid":"27707","created_gmt":"2026-10-29 18:17:26","changed_gmt":"2026-10-29 18:18:20","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2026-11-06T12:00:00-05:00","event_time_end":"2026-11-06T14:00:28-05:00","event_time_end_last":"2026-11-06T14:00:28-05:00","gmt_time_start":"2026-11-06 17:00:00","gmt_time_end":"2026-11-06 19:00:28","gmt_time_end_last":"2026-11-06 19:00:28","rrule":null,"timezone":"America\/New_York"},"location":"Applied Physiology Building (555 14th St.), Room 1253","extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}