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A new study has for the first time identified regions of the genome associated with left-handedness in the general population and linked their effects with brain architecture. The study linked these genetic differences with the connections between areas of the brain related to language.

Research found that one genetic region (rs199512) associated with handedness influenced brain cytoskeletal architecture (in blue) linking language-related brain regions (in green and orange), which were also more coordinated in left-handers. Image courtesy of Prof. Douaud and Dr. Wiberg, Oxford University.
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