Figure 3: Learned receptive fields and connectivity.
From: Spontaneous emergence of fast attractor dynamics in a model of developing primary visual cortex
(a, left) Feedforward receptive fields after development (obtained by subtracting the OFF-centre weight from the ON-centre weight for every input pixel). Following exposure to natural stimuli, the 100 principal cells developed oriented, biphasic receptive fields. (b, centre) Connection matrix between the cells (that is, lateral connections). The matrix is sparse and highly symmetrical, revealing strongly bidirectional connectivity. (c, right) Distribution of learned E-E weights. Most connections have zero weight, with the non-zero weights forming a single smoothly decaying mode, due to the stabilizing weight-dependent plasticity (see Methods).
