The learning of one's own
native language , typically that of one's parent(s) or legal guardian(s), normally occurs spontaneously in early human childhood and is biologically driven. A crucial role of this process is performed by the neural activity of a portion of the human brain known as Broca's area.
There are approximately 7,000 current human languages, and many, if not most seem to share certain properties, leading to the belief in the existence of Universal Grammar, as shown by generative grammar studies pioneered by the work of Noam Chomsky. Recently, it has been demonstrated that a dedicated network in the human brain (crucially involving Broca's area, a portion of the left inferior frontal gyrus), is selectively activated by complex verbal structures (but not simple ones) of those languages that meet the Universal Grammar requirements.
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