Точно не припомню где, но читал что у детей выросших в условиях "типа Маугли" при вскрытие были обнаружены атрофирование частей мозга которые руководят языком и мышлением.

А вот ещё: http://www.sciencedaily.com/releases...0905071926.htm

Numerous previous studies have compared the individual brain cells and the brain in toto in man and animals and found that cells are essentially identical and that the brains looked from the outside at least very similar other than size differences.

For example, the chimpanzee is man's closest evolutionary relative; the two have about 99 percent of their DNA in common, but the human brain is about three and one-half times larger. "The question has been, what else changed besides size," Dr. Casanova said.

After examining brain tissue from humans, rhesus monkeys and chimpanzees obtained from the Yakovlev-Haleem Brain Collection at the Armed Forces Institute of Pathology in Washington, D.C., they believe that how brain cells are organized to work together is a key difference.

"We found evidence that the brain is organized differently in humans in this area of the brain, even though the outside looks the same," Dr. Buxhoeveden. "This provides an anatomical substrate, a hint that the brain is wired differently in humans in the language area than in the chimpanzee or the monkey."

"Now we will be looking at this to describe pathologies that are subtle, that don't have classical symptoms that you see in diseases such as Alzheimer's, where there are obvious, major things wrong with brain tissue," he said. "In diseases such as schizophrenia and autism, those obvious symptoms aren't there. But we believe that you will find them in the most subtle wiring of the brain."

The researchers are expanding their studies by including other species, including non-primates such as dolphins, mammals which have large, highly developed brains.

Но звучит как "курица и яйцо" вопрос. То ли у людей мозг вайрд по другому из-за тысячелетий пользования языком. То ли язык возник из-за эволюционной спонтанной мутации в ваиринге. Или что-то ещё нам непонятное/неизвестное пока. :confused: