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Fri, Apr 22

Speaker: Xiaogang Hu (Pennsylvania State University)

Title: Adaptive Force Coordination: Influence of Intrinsic Coupling, Visual Information and Task Asymmetry

Abstract:   A central issue in motor control is how the central nervous system coordinates the redundant components of the neuromuscular system to fulfill various task goals. The constraint-on-action theory proposes that three categories of constraints (intrinsic organism, external environment, and task) interact and determine optimal coordination and control patterns. Based on this theory, we examine the adaptability of the patterns of multi-muscle force coordination when the constraints are changed.
We hypothesize that each of the three categories of constraints is weighted based on their relative influence on the force coordination patterns and the realization of the task goal. Using the satisficing approach, we propose a model to quantify the constraint weightings that reflect the interactive influence of the categories of constraints on force coordination. The results, which show flexible patterns of muscle force coordination, enhance our understanding of the adaptive control of muscle force and provide implications for the development of rehabilitation therapies.
Host: William Z. Rymer