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Brief Communication

Nature Neuroscience 11, 426–428 (1 April 2008) | doi:10.1038/nn2072

The evolution of the arcuate fasciculus revealed with comparative DTI

James K Rilling , Matthew F Glasser , Todd M Preuss , Xiangyang Ma , Tiejun Zhao , Xiaoping Hu & Timothy E J Behrens

The arcuate fasciculus is a white-matter fiber tract that is involved in human language. Here we compared cortical connectivity in humans, chimpanzees and macaques (Macaca mulatta) and found a prominent temporal lobe projection of the human arcuate fasciculus that is much smaller or absent in nonhuman primates.