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What kind of network is the brain?

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Despite the intense current interest in the connectome, a fundamental question is seldom asked: Are the corpus callosum and the intrahemispheric white-matter tracts part of a neural net, where information is embodied in the structure of the net, or do they constitute a communications network, where the same physical substrate carries different information from moment to moment? We argue for the latter. A constraint that has become clear in last year (from the work of Rosen and Halgren) is that only 4% of cortical pyramidal cells have access to long-range tracts. This estimate is concordant with the classical histology of Schüz and Braitenberg.

This research is in collaboration with Marina Danilova and Chie Takahashi.

This talk is part of the Zangwill Club series.

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