Features of changes of higher nervous performance indicators on stress influence in preliminary gamma- radiation-exposed of rats

Abstract

Studies of active avoidance behavioral reactions (shuttle box) changes under exposure of stress (foot-shock) in the rats preliminary exposed to single total γ-radiation at doses of 0.5 and 1.0 Gy gave the following results. Reactions of conditioned behavior indices to stress are individual, but in general they are characterized by signif-icant direct effect of activation, which could be followed by depression during time period after stress applica-tion. Effects of stress in the rats previously exposed at the dose of 1.0 Gy exceed those in the animals both direct-ly after stress application and during the time periods without stress. Interaction between factors of ionizing radi-ation and stress were found for the tested indices at the dose of 1.0 Gy. Rats exposed at the dose of 0.5 Gy in-crease of direct response to stressing was not found, but it was evident in delayed responses.

Keywords

• ionizing radiation
• stress
• rats’ behavior