Explainer: How The Brain Changes When We Learn To Read
Nicola Bell, 18 May 17
       

Learning to read is not actually that easy. from shutterstock.com

Right now, you are reading these words without much thought or conscious effort. In lightning-fast bursts, your eyes are darting from left to right across your screen, somehow making meaning from what would otherwise be a series of black squiggles.

Reading for you is not just easy – it’s automatic. Looking at a word and not reading it is almost impossible, because the cogs of written language processing are set in motion as soon as skilled readers see print.

And yet, as tempting as it is to think of reading as hard-wired into us, don’t be fooled. Learning to read is not easy. It’s not even natural.

The first examples of written language date back to about 5,000 years ago, which is a small fraction of the 60,000 years or more that humans have spent using spoken language.

This means our species hasn’t had enough time to evolve brain networks that predispose us to learn literacy. It is only through years of practice and instruction that we have forged those connections for ourselves.

How the brain learns to read

Brains are constantly reorganising themselves. Any time we learn a new skill, connections between neurons that allow us to perform that skill become stronger. This flexibility is heightened during childhood, which is why so much learning gets crammed in before adolescence.

As a child becomes literate, there is no “reading centre” that magically materialises in the brain. Instead, a network of connections develops to link existing areas that weren’t previously linked. Reading becomes a way of accessing language by sight, which means it builds on architecture that is already used for recognising visual patterns and understanding spoken language.

Words and letters are initailly stored in the brain as symbols. from www.shutterstock.com

The journey of a word

When a skilled reader encounters a printed word, that information travels from their eyes to their occipital lobe (at the back of the brain), where it is processed like any other visual stimulus.

From there, it travels to the left fusiform gyrus, otherwise known as the brain’s “letterbox”. This is where the black squiggles are recognised as letters in a word. The letterbox is a special stopover on the word’s journey because it only develops as the result of learning to read. It doesn’t exist in very young children or illiterate adults, and it’s activated less in people with dyslexia, who have a biological difference in the way their brains process written text.

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