Optical imaging data show that the cat's visual cortex contains patches of cells that respond to low spatial and high temporal frequencies; outside the patches, calls respond to high spatial and low temporal frequencies. The results suggest a possible anatomical substrate for psychophysically defined spatial frequency channels.
Swindale, N. V. (1997). Visual cortex: A cat’s-eye view of the visual system. Current Biology, 7(6). https://doi.org/10.1016/s0960-9822(06)00182-5