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Abstract:
The complexity of cortical circuits may be characterized by
the number of synapses per neuron. We study the dependence of
complexity on the fraction of the cortical volume that is made up
of``wire'' (that is, of axons and dendrites), and find that
complexity is maximized when wire takes up about 60\% of the
cortical volume. This prediction is in good agreement with
experimental observations. A consequence of our arguments is that
any rearrangement of neurons that takes more wire would sacrifice
computational power.
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