The difficulties in the social interaction can disclose comuma inapropriao of the behavior and of the manifestations of affection, an isolation, a esquiva of the visual contact, a complete lack of interaction with the other, affective umaindiferena and a lack of social empatia, thus describe Gadia eTuchman (2004). Riots of the mood and the affection are common in the syndrome doautismo, if they reveal through crises of laughs or aparentementedesmotivados choros, lack of danger perception or exaggerated fear, ansiedadegeneralizada and little or no emotional reaction. These difficulties incluemhiperatividade, aggressiveness, carelessness and behavior of automutilao, to einterferem very in the interaction of the autistas children inside of the family, daescola, of the community. The language riots occur in different degrees, some children do not develop no ability of verbal communication, others have an immature communication characterized by jargon, ecolalias, monotonous tune etc. The autistas children present repetitive and estereotipados standards decomportamento related to the strong resistance amudanas, extreme attachment the routine and objects and allure for movimentoscirculares. According to Assuno and Pimentel (2000), the prevalence dasndrome of the autismo is four times bigger in boys of what in girls. Suaepidemiologia corresponds the 1 approximately the 5 cases in each 10.000crianas, in a ratio of 2 the 3 men for 1 woman. Great linking between autismo and mental deficiency exists, a time that about 70-86% of the autistas is deficient mental. Suadiferenciao of the pictures of mental deficiency is complicated, many times realizada through the presence or not, of qualitative comprometimento nodesenvolvimento of the social interactions and in the comunicacionais abilities that, in the mental deficiencies, when exactly present, not it is the maisimportante characteristic as in the autismo. In first place, it is basic that a diagnsticodiferencial is made enters the syndrome of the classic autismo as described Kanner, deoutras syndromes as, for example, the syndrome of Asperger and the syndrome deRett, that they bring autsticas guidelines in its pictures, and of an episode autsticoque can come to affect a citizen.