Considering that alcohol is a drug of high consumption, it is very important to understand its action on the embryonic nervous system and its role in the etiology of cognitive deficits that are neglected, since these deficits can affect the quality of life or relate to the origin and aggravation of mental illness. The result that drew the most attention was the fact that embryonic exposure to ethanol produced "a specific type of cognitive damage", and that only spontaneous alternation was altered by exposure to ethanol.