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Tuesday, May 3, 2016

Where Your Brain Stores Words

This Interactive 3D Model Shows Where Your Brain Responds to Different Words (+Video)

Christopher Groskopf | April 30, 2016

If you’ve ever wondered where exactly words are in your brain, scientists from the University of California at Berkeley have something to show you. In a paper published Wednesday (April 27) in the journal Nature (paywall), researchers describe the results of an experiment where they had test subjects listen to The Moth Radio Hour for two hours each. While the show played, they recorded the listener’s reaction using an fMRI machine. Their results show what specific parts of the brain react to different groups of words.

A Sample of the Interactive Model from:

<more at; related articles and links: (Semantic Maps) and (Natural speech reveals the semantic maps that tile human cerebral cortex. Alexander G. Huth, Wendy A. de Heer,Thomas L. Griffiths, Frédéric E. Theunissen and Jack L. Gallant. Nature 532, 453–458 (28 April 2016) doi:10.1038/nature17637. [Abstract: The meaning of language is represented in regions of the cerebral cortex collectively known as the ‘semantic system’. However, little of the semantic system has been mapped comprehensively, and the semantic selectivity of most regions is unknown. Here we systematically map semantic selectivity across the cortex using voxel-wise modelling of functional MRI (fMRI) data collected while subjects listened to hours of narrative stories. We show that the semantic system is organized into intricate patterns that seem to be consistent across individuals. We then use a novel generative model to create a detailed semantic atlas. Our results suggest that most areas within the semantic system represent information about specific semantic domains, or groups of related concepts, and our atlas shows which domains are represented in each area. This study demonstrates that data-driven methods—commonplace in studies of human neuroanatomy and functional connectivity—provide a powerful and efficient means for mapping functional representations in the brain.])>

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