Investigation of the physiological effect of heated heliox on the human external respiration parameters

: Comparative analysis was given to the results of computerized evaluation of mental effectiveness (SOPR-monitoring) during habitual work implementation and modellng of extreme spaceflight factors. SOPR-monito ring includes the following tests: SAN (general condition, activity, mood), 8-color M. Luscher test, continuous counting at auto speed, and target tracking. Implementation of habitual work (repeated testing of a subject over the period of 1.5 years) showed almost double improvement of mental effectiveness with the sensorimotor parameters remaining virtually unaltered. Different phases in diurnal variations of the mental and sensorimotor activities were established. Modeling of the challenging factors of space flight (bed rest and confinement) gave proof of a greater sensitivity of mental effectiveness, more dependent on cerebral circulation, comparing to sensorimotor performance. Computerized SOPR-monitoring is an easy-to-use and informative method for evaluation of external effects on mental effectiveness.