In adults that are born blind, the "visual" cortex is activated in a similar way during a listening task, according to new research in JNeurosci. The results answer questions about how development can override anatomy to influence brain function.
Previous research observed that the "visual" cortex in blind people is recruited for other functions, but it was not known if the new purpose was consistent or varied from person to person.
Loiotile et al. used functional magnetic resonance imaging to compare how the auditory and visual cortices of the brain were activated in blind and blindfolded, sighted participants while listening to audio clips from movies. Sixty-five percent of the regions in the visual cortex had similar activation among the blind participants when they listened to the movie clips. The similarity diminished when the sentences were played in a random order or the track was played backwards, indicating that the region is used for higher-order processing. These results suggest that there is an underlying organization that dictates how the visual cortex is repurposed in blind people, and that it is not random.
Manuscript title: Naturalistic Auditory Stories Synchronize "Visual" Cortices Across Congenitally Blind but Not Sighted Individuals
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JNeurosci, the Society for Neuroscience's first journal, was launched in 1981 as a means to communicate the findings of the highest quality neuroscience research to the growing field. Today, the journal remains committed to publishing cutting-edge neuroscience that will have an immediate and lasting scientific impact, while responding to authors' changing publishing needs, representing breadth of the field and diversity in authorship.
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The Society for Neuroscience is the world's largest organization of scientists and physicians devoted to understanding the brain and nervous system. The nonprofit organization, founded in 1969, now has nearly 37,000 members in more than 90 countries and over 130 chapters worldwide.