Spatial frequency tuning. A , Histogram of peak spatial frequency response. B , Median peak spatial frequency across layers demonstrates lower preferred spatial frequency in layer 6 and putative inhibitory (inh) units. C , Width of spatial frequency tuning. Arrows in A and C show values from units presented in Figures 2 and 3. LP, Low-pass tuning. D , Median spatial frequency tuning width shows broader tuning in layer 5 and putative inhibitory units. n = 182 units total; n = 14, 40, 31, 34, 24, and 39 by cell type.