Quantitative Synaptic Map

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A Quantitative Map of the Circuit of Cat Primary Visual Cortex
Tom Binzegger, Rodney J. Douglas, and Kevan A. C. Martin

The map of the whole cortical circuit shows that there are very few “strong” but many “weak” excitatory
projections, each of which may involve only a few percentage of the total complement of excitatory synapses of a single neuron.