[Analysis of interdependence of temperament, neuroendocrine control and psychophysiological status during dry immersion].

Interdependence of temperament, hormonal and psychophysiological status was investigated in 8 young volunteers for 7-d dry immersion (DI). Blood levels of insulin, sex, steroid, thyroid hormones and psychomotor parameters were determined on DI days 3 and 7, and on day 7 of recovery. Before DI, the volunteers filled in the Kettelle personality questionnaire. During DI, anxious subjects spent less time to compare visual patterns demonstrating high and stable speed of reactions but made a bit more errors. Extraverts showed high speed of reactions and stability of psychomotor parameters and did not increase the number of errors. Easy-tempered and introvert subjects preserved inherently high insulin concentrations in DI. Support deprivation was attended by drop of the levels of triiodothyronine and cortisol and rise of prolactin and thyroxin. Results of multiple correlation analysis led to the conclusion that DI accentuates the role of original extra-introversion and dampens origin anxiety. Successfulness can be attained by adequate alteration of the levels of steroid and thyroid hormones with effectively balanced vagoinsulin-sympathoadrenal neuroendocrine control and monoaminergic CNV activity.