Fig 3. Predicted spatial frequencies as a function of the wave speed and STDP time scale.

In all plots, solid black contours denote spatial frequencies equal to 10 raised to integer exponents. A. Predicted spatial frequencies for an asymmetric STDP rule as a function of v and τ ₊. White triangle: when τ ₊ is longer than the burst duration, scaling τ ₊ or v by the same amount has the same effect on the spatial frequency. Green triangle: when τ ₊ is shorter than the burst duration, the burst duration has a noticeable influence on the spatial frequency. Red rectangle: wave speeds recorded in the cerebellum, ventral cortex and hippocampus of neonatal mice occupy this region for STDP rules with τ ₊ ≈ 20 ms. B. Landscape of predicted spatial frequencies for a symmetric STDP rule.