A closed loop musculoskeletal model of postural coordination dynamics

A closed-loop model with actuator dynamics and sensory feedback has been developed to capture the complex postural behaviors observed in a human head tracking task. In motor-control litterature, spindle feedback gains are scaled by the central nervous system to adapt muscle stiffness depending on the postural task. We propose to identify spindle reflex equivalent feedback gains for several target's frequency values. Comparison with experimental results on human shows the relevance of this modeling, since our musculoskeletal model is able to exhibit reasonably well the behavioral invariants observed in human postures.

• Type: Conference
• Year: 2009
• Where: CDC
• Authors: Vincent Bonnet, Philippe Fraisse, Nacim Ramdani, Julien Lagarde, Sofiane Ramdani, Benoît G. Bardy
• Keywords: CDC 2009, Control Systems, Equivalent Feedback Gains, Feedback Gains, Spindle Feedback Gains