[The significance of perinatal alcoholization and its withdrawal in the development of late cognitive disorders in rats].

To study the effect of perinatal alcoholization and its withdrawal on cognitive functions of rats, 25% ethanol solution was administered intragastrically: (1) over the whole period of the rat pregnancy in a dose of 5 g/kg/day; (2) from the Ist day of pregnancy to the 7th day after genera in a dose of 5 g/kg/day; (3) from the Ist day of pregnancy to the 2nd day after genera in a dose of 5 g/kg/day; and then in daily decreased doses (by 1g/kg) to the 7th day. A less pronounced increase in the rat mass and disturbances in maternal behavior (eating up the descendants) was observed for all alcoholization regimes. Alcoholization inhibited the eye opening, but did not affect the body mass increase and elementary inborn reflexes of descendants during the first three weeks of life, whereas in adult male descendants alcoholization deteriorated the ability to training and memory on the "open field" model and bilateral avoidance response. The cognitive disorders in descendants were more pronounced after abrupt withdrawal of ethanol directly after the birth and were minimal after gradual withdrawal of alcohol.