Patent ID: 7433733

Claim:
A method of measuring motions of an animal made by activities of muscle fibers, comprising the steps of: a first myoelectric potential measurement step for measuring, by electrodes adapted to be attached to an animal's body, first myoelectric potentials generated in the animal's body; a first variable measurement step for measuring, based on outputs from sensors adapted to be attached to the animal's body, a motion variable varying with the animal's motions; a reference relational expression setting step for setting a reference relational expression representing a relation between the myoelectric potentials and the motion variable based on the first myoelectric potentials measured in the first myoelectric potential measurement step and the motion variable measured in the first variable measurement step; a second myoelectric potential measurement step for measuring, by said electrodes attached to the animal's body, second myoelectric potentials generated in the animal's body, following said reference relational expression setting step; and a second variable measurement step for newly measuring said motion variable based on the myoelectric potentials measured in the second myoelectric potential measurement step and according to the reference relational expression set in the reference relational expression setting step.