Brain fibres. 3D diffusion tensor imaging (DTI) magnetic resonance imaging (MRI) scan of a selection of nerve pathways (blue, pink, green) in the brai
Brain fibres. 3D diffusion tensor imaging (DTI) magnetic resonance imaging (MRI) scan of a selection of nerve pathways (blue, pink, green) in the brain. The front of the brain is at left. The ventricles are yellow and the brain's cortical surface is also shown. The fibres in the right hemisphere (upper left) are part of the motor system. In the left hemisphere (lower right) are functionally active areas and connections (pink) that go though them. Diffusion tensor imaging measures the direction of water diffusion, which in the brain reveals the orientation of nerve fibres. The technique is also known as tractography, with the resulting image known as a tractogram.
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Photo credit: © SHERBROOKE CONNECTIVITY IMAGING LAB/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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