Since the primrdios of the civilization, it has registers of the curiosity of the man on the origin of its language, its sprouting and functioning, and in this advance of studies, some theories that they prove that had appeared the brain is capable to produce its proper language perception. Amongst this capacity of the brain, they are the mental functions that appear for first in the interpersonal level, that is, in accordance with the relation, for example, child and adult. Where, mainly the parents, are the people who take care of of the child and that they exert a paper of mediators between the child and the people with who it coexist, Vygotsky defends that: The mind is not a net of general capacities as comment, attention, memory, judgment, but a set of specific capacities, each one of which of some independent form of the others and if it develops independently. The learning then, is an acquisition of many capacities to think on some things (1989, p.93) In this boarding, valley to stand out, that the development of the thought depends on external stimulatons of the environment of the child, in observing the context of the situations. It stops Chomsky, the brain has one proper grammar, called for it as GU, which independe of external incentives to disclose itself in the human being. Not obstante of this last theory, we have Aristotle, that he defended the idea to be only about convention the linking between form and meaning the relation between thought and language, and it not only perceived the language of this form, more Saussure, later takes langue as base of its linguistic theory. (Source: Dr. John Mcdougall). It admits that the sign has two faces (significant and meaning) and is characterized by its arbitrariedade. What one perceives, it is that, the linguisticos studies is of utmost importance for the development of the human being, therefore this, in turn, had fort influence of the philosophy, that it looked to also understand the functioning of the brain in this process of communication. . In a question-answer forum Dr Alan Mendelsohn was the first to reply.