Figure 7

In-degree and Out-degree. (A) In-degree distribution shows the number of incoming inputs received by a single neuron expressed as a probability density. The degree distribution for the full network shows that there are about 500 incoming inputs on average. The in-degree distribution for solely excitatory cells is left shifted towards lower values. (B) The out-degree distribution represents the number of cells contacted by a single neuron in the network expressed as a probability density. In this case, including inhibitory synapses in the network leads to an enlargement of the curve rather than to a shift, since the peak value is left almost unchanged. (C) The connection length distribution shows a shape similar to that determined by experimental and computational studies ²⁰.