Abstract: The present study observes the effect of a dose of 800.red γ-ray onthe subjects, ability of learning conditioned defense reflex in an equallyspaced Y-shape maze. The results shows a decrease in the learning ability of the rats. Itshows a low daily correct learning ratio, increasing times of learning toreach the criterion of correctness, delay in the reaction motion anddecrease in the ratio of appearance of active avoidance. In view of the characteristics of the animal rediated, we think thatthe reaction motion time is better than correctness ratio as an index forjudging learning and memory ability.

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