Nobel laureate neuroscientist Sir John Eccles wrote: “No area corresponding to the . . . speech area of Broca has been recognized in apes.” Even if some similar areas are found in animals, the fact is that scientists cannot get apes to produce more than a few crude speech sounds. You, though, can produce complicated language. To do so, you put words together according to the grammar of your language. Broca’s area helps you do that, both in speaking and in writing.

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Language and Intelligence

Why does human intelligence far surpass that of animals, such as apes? A key is our use of syntax—putting sounds together to make words and using words to make sentences. Theoretical neurophysiologist Dr. William H. Calvin explains:

“Wild chimpanzees use about three dozen different vocalizations to convey about three dozen different meanings. They may repeat a sound to intensify its meaning, but they do not string together three sounds to add a new word to their vocabulary.

“We humans also use about three dozen vocalizations, called phonemes. Yet only their combinations have content: we string together meaningless sounds to make meaningful words.” Dr. Calvin noted that “no one has yet explained” the leap from the animals’ “one sound/one meaning” to our uniquely human capacity to use syntax.