title: Using mutual information to capture major concerns of postural control in a tossing activity.
abstract: Human body motion for load-tossing activity was partitioned into three phases using four critical events based on the load position viz. lift-off, closest to body, peak and release. For each phase, three objective functions values, viz. mobilization, stabilization and muscular torque utilization, used to control the motion patterns, were then calculated. We hypothesize that the relationships between different objective functions can be extracted using information theory. The kinematic data obtained with 36 treatment combinations (2 tossing distances, 2 tossing heights, 3 weights, and 3 target clearances) was used to estimate the mutual information between each pair of objective functions and construct Chow-Liu trees. Results from this research indicate that there was no dominant concern in the first two phases of the activity; however, torque utilization and mobilization were found to be important factors in the third phase of the load tossing activity.
authors: Department of Industrial Engineering, Texas Tech University, Lubbock, TX 79409, USA. Electronic address: harshvardhan.gazula@ttu.edu.
authors: Harshvardhan
authors: H
authors: Gazula
authors: Department of Industrial Engineering & Engineering Management, National Tsing Hua University, Taiwan, ROC.
authors: Chien-Chi
authors: CC
authors: Chang
authors: National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Cincinnati, OH 45226, USA.
authors: Ming-Lun
authors: ML
authors: Lu
authors: Department of Industrial Engineering, Texas Tech University, Lubbock, TX 79409, USA.
authors: Simon M
authors: SM
authors: Hsiang
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena / Q000502:physiology; D005260:Female; D006801:Humans; D007257:Information Theory; D007700:Kinetics; D008297:Male; D008954:Models, Biological; D009038:Motion; D009043:Motor Activity / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D009142:Musculoskeletal Physiological Phenomena; D004856:Postural Balance / Q000502:physiology*; D019415:Torque
keywords: Chow–Liu tree; Information theory; Tossing