Cooperative coding of continuous variables in networks with sparsity constraint
Fig 7
2D network schematic and response times versus RF size.
(A) Schematic of a two-dimensional network responding to a two-dimensional stimulus. Feature neurons (labeled “Response x”) and input neurons (labeled “Inputs r”) are arranged on two-dimensional grids. In the cooperatively coding network each feature neuron receives one feedforward and four recurrent inputs; activities and shown connections are color-coded as in Fig 2. (B) Response times in the cooperatively coding 2D network increase linearly (without inhibition, blue. Monomial fit: ) or square-root-like (with inhibition, red. Monomial fit:
) with the RF size
. Dotted lines represent the monomial fits. Data was created by scanning
, setting
to 0 or its critical value, and determining
and
or
, respectively, from the response curves after network activity converged.