Maze learning in pre- and neonatally X-irradiated rats.

Abstract
Albino rats were given X-irradiation of 100, 200, or 300 r. on days 14-15, 16 or 18 of the gestation period (in utera), or immediately after birth. At the ages of 45-50 days they were given 25 trials in a Lashley HI maze and retested after a 30-day rest period. Learning was adversely affected by irradiation. At day 14-15 a 100 r. dose was effective, on day 18 a 200 r. dose effective, and for neonatal Ss only those receiving 300 r. showed decrements.

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