Complexity of the Human Motor Action System

from the Viewpoint of Motor Physiology

Abstract

　In order to study the complexity of the skeleton-muscle system in human motor action, diversification and stratification are very important. Traditionally, the top-down exercise command system from the brain nervous system to the skeletal muscle system in environment is regarded as important. Recently, however, the possibility of rebuilding the entire system by iterative bottom-up information of the skeleton muscle system to the brain nervous system has begun to be seen as important.
　In this study I try to examine my hypothesis of the “3x3 system”, (three muscle fiber types by three energy supply types) which plays its part in transforming the appropriate motor skills in response to the reduction of the energy supply system.
　To consider this hypothesis, I analyze the transformation of running skills during an actual long-distance race. Well trained runners altered their running skills as a result of the adaptation of the human movement system in progress.
　However, the totality of such complex systems is difficult to examine empirically. Probably, a bird’s-eye view integrate research strategy is necessary for the construction of the research system.