Structural Properties of the Caenorhabditis elegans Neuronal Network
Figure 6
Degree distribution (a) and survival functions for the distributions of in-/out-degree, multiplicity, and in-/out-number of synaptic terminals in the chemical synapse network (b)–(f).
Neurons or connections with unusually high statistics are labeled. The tails of the distributions can be fit by a power law with exponents for in-degree (b);
for out-degree (c); and
for out-number (f). The exponents for the survival function fits can be obtained by subtracting one. The survival function of the multiplicity distribution for
can be fit by a stretched exponential of the form
where
and
(d). No satisfactory fit was found for the distribution of in-numbers (e).