Ibbotson, MichaelPrice, NCrowder, Nathan2015-12-130022-3077http://hdl.handle.net/1885/73679Hubel and Weisel introduced the concept of cells in cat primary visual cortex being partitioned into two categories: simple and complex. Subsequent authors have developed a quantitative measure to distinguish the two cell types based on the ratio betweenKeywords: animal cell; cat; cell division; cell type; cellular distribution; controlled study; marsupial; monkey; nonhuman; phylogeny; priority journal; quantitative analysis; rat; review; spatial frequency discrimination; visual cortex; Action Potentials; Animals;200510.1152/jn.01159.20042015-12-11