Human evolution; newborn brains wired for word recognition (Introduction)

by David Turell , Monday, September 27, 2021, 18:52 (1151 days ago) @ David Turell

Shown by very early fMRI's:

https://www.sciencedaily.com/releases/2020/10/201022125525.htm

"Humans are born with a part of the brain that is prewired to be receptive to seeing words and letters, setting the stage at birth for people to learn how to read, a new study suggests. Analyzing brain scans of newborns, researchers found that this part of the brain -- called the 'visual word form area' (VWFA) -- is connected to the language network of the brain.

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"The VWFA is specialized for reading only in literate individuals. Some researchers had hypothesized that the pre-reading VWFA starts out being no different than other parts of the visual cortex that are sensitive to seeing faces, scenes or other objects, and only becomes selective to words and letters as children learn to read or at least as they learn language.

"'We found that isn't true. Even at birth, the VWFA is more connected functionally to the language network of the brain than it is to other areas," Saygin said. "It is an incredibly exciting finding."

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"The researchers analyzed fMRI scans of the brains of 40 newborns, all less than a week old, who were part of the Developing Human Connectome Project. They compared these to similar scans from 40 adults who participated in the separate Human Connectome Project.

"The VWFA is next to another part of visual cortex that processes faces, and it was reasonable to believe that there wasn't any difference in these parts of the brain in newborns, Saygin said.

"As visual objects, faces have some of the same properties as words do, such as needing high spatial resolution for humans to see them correctly.

"But the researchers found that, even in newborns, the VWFA was different from the part of the visual cortex that recognizes faces, primarily because of its functional connection to the language processing part of the brain.

"'The VWFA is specialized to see words even before we're exposed to them," Saygin said.

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"'Our study really emphasized the role of already having brain connections at birth to help develop functional specialization, even for an experience-dependent category like reading.'"

Comment: Was this wiring arrangement present 70,000 years ago when it is thought complex language developed or did the brain circuits evolve quickly since then? I think God had the brains pre-wired and therefore ready to accommodate the new skill.