Before revision:  The grids URLanized in modules with spatial periods  clustered around discrete values separated by constant ratios reported in the range 1.3-1.8 . We propose a mechanism for dynamical URLanization in the mEC that can produce this modular structure  .
After revision:  The grids URLanized in modules with spatial periods clustered around discrete values separated by constant ratios reported in the range 1.2--2.0 . We propose a mechanism for dynamical URLanization in the mEC that can produce this modular structure .