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Scientists closer to unlocking the human speech

July 25 2006

U.S. scientists have discovered that when a voice communication with other dogs in rhesus monkeys exposed to activated parts of the brain related to the same group, which is responsible for speech function in humans, reports ScienceDaily.

This serves as another confirmation of the hypothesis according to which the common ancestor of humans and other primates could have a key neuronal mechanisms, which was built and language development. Scientists believe it will help determine at what stage of evolution came first "building blocks" of speech communication. This discovery was possible only with the advent of imaging technology functions of the brain.

The experiment was first established that the sound of individuals of the same species, caused greater activation in one and the centers of the brain of animals. These points correspond to the speech centers of people. In contrast, "non-biological" sounds even acoustically similar to signals of monkeys, did not activate these areas of the brain.

Based on the findings, researchers have hypothesized that the centers of speech communication at the evolution of the last common ancestor of macaques and humans - in particular, the centers responsible for intraspecific voice ("the proto-language") - could serve as a basis for further development of meaningful speech in humans .

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