Patent ID: 7467010
Filing Date: 2008-12-16
Classification: A61B

Abstract:
1. A stress-at-work evaluating method for evaluating stress of a subject at work based on measuring the activities of one of the right and the left masseter muscles, the work including exercise of the subject's arms or feet, wherein the stress-at-work evaluating method comprises: a myoelectric potential measurement step of sensing and amplifying a myoelectric potential of one of the right and the left masseter muscles, the potential being generated through the activities of one of the right and the left masseter muscles at work; a processing step of processing time-series data of the measured myoelectric potential of the one of the right and the left masseter muscles and calculating the intensity information on myoelectric potential of the one of the right and the left masseter muscles; a judging step of judging the level of an external force acting on the subject's head, the external force measured simultaneously with the myoelectric potential; and an evaluating step of evaluating the level of stress of the subject at work, wherein the level of stress is obtained by dividing the calculated intensity of the myoelectric potential by the judged level of the external force.