Stress state discrimination by multi blood flow information

Abstract

Conventional single-channel laser doppler flowmetry has an issue of low ability in discriminating between relaxing and stress state. We develop a multi-channel laser doppler flowmetry and propose a novel method to use the standard deviation of multi-channel signals in order to improve the stress state discriminating ability. The effect of proposed method is evaluated by bio-psychological experiments and the result shows that our method improves the ability.