Figure 3.

(A) Computer printouts of superimposed swimming trajectories of control (CO) and irradiated (IR) rats trained in darkness. The rats start at south, and the position of the platform at northwest is indicated by a black dot. The irradiated rats mostly swam close to the wall of the pool and covered a crescent-shaped area around the platform, whereas the trajectories of the control rats contracted gradually to a compact and efficient form by day 28. (B) Latency to find the platform in the dark, under fixed start (south)–fixed goal (northwest) conditions, by the control (CO-AVR) and irradiated (IR-AVR) rats. The columns represent the mean (±SEM) escape latency in 7-day blocks.