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Cooperative coding of continuous variables in networks with sparsity constraint

Fig 9

Number of synaptic connections for the feedforward and cooperative coding architecture depending on RF size, for different sizes of feature populations.

Total number of synapses in a network of N_F = 41 feature populations as a function of RF size and number of neurons N_E per feature population (color-coded). In the feedforward network the number of synapses (solid lines) depends linearly on RF size with a slope proportional to N_E. In the cooperative network the number of synapses (dotted lines) is independent of RF size but increases quadratically with N_E. Vertical lines mark the minimal RF size for which the cooperative network saves synapses compared to the feedforward network (). Synapse numbers are shown here for and .

doi: https://doi.org/10.1371/journal.pcbi.1012156.g009