| This thesis tackles the Equilibrium theory and the relations between the theory and violin performance, including the balance of performing state and of performing system. In this study, the relations between physiological and psychological factors, techniques and art of equilibrium and violin performance will be discussed in all its aspects. The purpose of the thesis is to arrange the complex factors and variable state of performing physiology and psychology, and to discuss how to deal properly with the relations between emotion and sensibility musical expression. |