Muscle recruitment by the min/max criterion -- a comparative numerical study.
This paper introduces the min/max criterion for simulation of muscle recruitment in multiple muscle systems. The criterion is introduced and justified by comparison to two known criterion types: the polynomial criterion and the soft saturation criterion. The comparison is performed on a planar three-muscle elbow model performing a dumbbell curl. A generalized form of the soft saturation criterion is introduced, and it is shown that the min/max criterion can be interpreted as the limit of the classical criteria when the exponents in their mathematical expressions approach infinity. We finally show how the min/max criterion can be cast into a form that allows for efficient and robust numerical solution by linear programming. It is concluded that the min/max criterion possesses a number of attractive physiological as well as algorithmic advantages.
Rasmussen
J
J
Institute of Mechanical Engineering, Aalborg University, Pontoppidanstraede 101, 9220 Aalborg East, Denmark. jr@im.auc.dk
Damsgaard
M
M
Voigt
M
M
D000465:Algorithms; D006801:Humans; D008954:Models, Biological; D018482:Muscle, Skeletal / Q000502:physiology*; D016474:Weight-Bearing