Wavelengths, 1/k*, were computed using the wave speeds given, a burst duration of 0.1 s, and the same asymmetric STDP rule for the first four rows, with τ
+ = 20 ms, τ
− = 40 ms, A
+ = 1.0 and A
− = 0.51. For retinal waves in the last row, we used a burst duration of 2 s, and an asymmetric STDP rule with τ
+ = 0.2 s, τ
− = 0.4 s, A
+ = 1.0 and A
− = 0.55.