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Notice and Invitation
Oral Defense of Doctoral Dissertation
Bioengineering Department
College of Engineering and Computing, George Mason University

Syeda Khadija Fatima Zaidi
Bachelor of Science, Bioengineering, University of Maryland, College Park, May 2012

Multi-scale Representations of Functional Movement - Quantitative Analysis of Upper Extremity Movement Severity and Dissimilarity after Stroke


Thursday, Nov. 16,  2023, 1:00 pm - 3:00 pm
Peterson 2000

In-person preferred. Zoom<https://gmu.zoom.us/j/94427544673?pwd=ZTl0QnF2dll5SjVjQnhUelBsZUFNdz09> if needed.
Meeting ID: 944 2754 4673
Passcode: 241981

All are invited to attend.

Committee
Dr. Qi Wei, Director
Dr. Siddhartha Sikdar, Chair
Dr. Shani Ross
Dr. Kathryn Laskey


Abstract
The upper extremity is a highly motor-abundant, non-linear, and non-periodic system of muscles and joints, with the ability to produce a vast variety of movements. From reaching for a toothbrush in the morning to pulling up the covers at night, our arms and hands are a significant part of how we interact with the world. Central Nervous System (CNS) injuries such as lesions consequent to stroke are a leading cause of disability, often accompanied by hemiparetic impairment and functional limitations in the ability to reach to grasp, transport, and release objects. Upper extremity impairment severity differs vastly from person to person, persistently affecting about 80% of persons six months past the stroke event. Without a model for translating movement capacities into individualized therapies, rehabilitative interventions are at best estimations of how the underlying neural structures will respond and produce movement. There is currently no consensus on which movements best represent the motor capacities of the upper extremity, and which kinematic metrics contribute to a comprehensive standardized representation of the multi-joint upper limb. A quantitative and universal summary index of upper extremity multi-joint movement would be a valuable tool for assessing limb coordination, compensatory maladaptations, and recovery. This dissertation describes the use of reaching as a representative functional task to develop an objective score of upper extremity motor performance. The Reach Severity and Dissimilarity Index was developed with novel data segmentation strategies, designed to identify preserved movement behaviors and be sensitive to stroke-related and age-related differences in bilateral coordination.




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