Table 1.

Open-field analysis of mice placed in a novel environment after exposure of γ-ray

	Distance (cm)	Movement time (s)	Movement episodes
Control	553.1 ± 41.8	257 ± 6.43	30.6 ± 3.08
2 Gy	649.6 ± 42.5	269.8 ± 1.66	24.8 ± 1.28
Roli +2 Gy	559.6 ± 25.7	261.4 ± 1.86	28.8 ± 1.74

Open-field data for sham-irradiated controls (irradiated with 0 Gy) , 2 Gy-irradiated and rolipram (Roli) -pretreated irradiation groups at 1 day after exposure (n = 5) . No significant differences were found in movement distance, ambulatory movement time, or the number of ambulatory movement episodes between vehicle-treated controls, 2 Gy-irradiated and Roli-pretreated irradiation groups at 1 day after exposure. The data are reported as the mean ± SEM.