New approach to terahertz diagnostics of human psychoemotional state

A new approach to terahertz (THz) diagnostics of the human psychoemotional state is proposed, based on the analysis of the THz contribution to the total signal while simultaneously recording the IR and THz emissions from the human body (hereinafter referred to as the IR - THz image). The developed image-processing algorithm allows extraction of the informative contribution determined by the THz radiation from the total signal perceived by the recording system. Simultaneous registration of the IR - THz images of the human face and the psychophysiological indicators are carried out in situations of physical stress (short-term intense physical exercise - squats functional test), electrical stimulation, and information stress (cognitive load - simple arithmetic mental calculations). The obtained data are compared with those of similar measurements at rest. It is shown that using cluster analysis of IR - THz images it is possible to divide the test subjects into classes according to the type of reaction of the circulatory system under stressful conditions.