# Taken from Binzegger, T., Douglas, R. J., & Martin, K. a C. (2004). A quantitative map of the circuit of cat primary visual cortex. The Journal of Neuroscience : The Official Journal of the Society for Neuroscience, 24(39), 8441–53. https://doi.org/10.1523/JNEUROSCI.1400-04.2004. The full table of data is also available in Izhikevich, E. M., & Edelman, G. M. (2008). Large-scale model of mammalian thalamocortical systems. Proceedings of the National Academy of Sciences of the United States of America, 105(9), 3593–8. https://doi.org/10.1073/pnas.0712231105. percent of cells (respect to total area) number of synapses per neuron nb1 p2/3 b2/3 nb2/3 ss4(L4) ss4(L2/3) p4 b4 nb4 p5(L2/3) p5(L5/6) b5 nb5 p6(L4) p6(L5/6) b6 nb6 corticocortical TCs TCn TIs TIn TRN nb1 1.5 8890 10.1 6.3 0.6 1.1 0 0 0.1 0 0 0.1 0 0 0 0 0 0 0 77.6 0 4.1 p2/3 L2/3 26 5800 0 59.9 9.1 4.4 0.6 6.9 7.7 0 0.8 7.4 0 0 0 2.3 0 0 0.8 0 0 0 p2/3 L1 1306 10.2 6.3 0.1 1.1 0 0 0.1 0 0 0.1 0 0 0 0 0 0 0 78 0 4.1 b2/3 3.1 3854 1.3 51.6 10.6 3.4 0.5 5.8 6.6 0 0.8 6.3 0 0 0 2.1 0 0 0.7 9.8 0 0.5 nb2/3 4.2 3307 1.7 48.6 11.4 3.3 0.5 5.5 6.2 0 0.8 5.9 0 0 0 1.8 0 0 0.6 13 0 0.7 ss4(L4) 9.2 5792 0 2.7 0.2 0.6 11.9 3.7 4.1 7.1 2 0.8 0.1 0 0 32.7 0 0 5.8 25.3 1.7 1.3 ss4(L2/3) 9.2 4989 0 5.6 0.4 0.8 11.3 3.8 4.3 7.2 2.1 1.1 0.1 0 0 31.1 0 0 5.5 23.9 1.7 1.3 p4 L4 9.2 5031 0 4.3 0.2 0.6 11.5 3.6 4.2 7.2 2.1 1.2 0.1 0 0 31.4 0.1 0 5.9 24.5 1.7 1.3 p4 L2/3 866 0 63.1 5.1 4.1 0.6 7.2 8.1 0 0.6 7.8 0 0 0 2.5 0 0 0.8 0 0 0 p4 L1 806 10.2 6.3 0.1 1.1 0 0 0.1 0 0 0.1 0 0 0 0 0 0 0 78 0 4.1 b4 5.4 3230 0 5.8 0.5 0.8 11 3.8 4.2 8.4 2.4 1.1 0 0 0 30.3 0 0 5.4 23.3 1.6 1.2 nb4 1.5 3688 0 2.7 0.2 0.6 11.7 3.6 4 8.2 2.3 0.8 0.1 0 0 32.2 0 0 5.7 24.9 1.7 1.3 p5(L2/3) L5 4.8 4316 0 45.9 1.8 0.3 3.3 2 7.5 0 0.9 11.7 1 0.8 1.1 2.3 2.1 0 11.5 7.2 0.1 0.4 p5(L2/3) L4 283 0 2.8 0.1 0.7 12.2 3.8 4.2 5.2 1.5 0.8 0.1 0 0 33.7 0 0 5.9 26 1.8 1.4 p5(L2/3) L2/3 412 0 63.1 5.1 4.1 0.6 7.2 8.1 0 0.6 7.8 0 0 0 2.5 0 0 0.8 0 0 0 p5(L2/3) L1 185 10.2 6.3 0.1 1.1 0 0 0.1 0 0 0.1 0 0 0 0 0 0 0 78 0 4.1 p5(L5/6) L5 1.3 5101 0 44.3 1.7 0.2 3.2 2 7.3 0 0.8 11.3 1.2 0.8 1.1 2.3 2.5 0.3 11.3 9.2 0.2 0.5 p5(L5/6) L4 949 0 2.8 0.1 0.7 12.2 3.8 4.2 5.2 1.5 0.8 0.1 0 0 33.7 0 0 5.9 26 1.8 1.4 p5(L5/6) L2/3 1367 0 63.1 5.1 4.1 0.6 7.2 8.1 0 0.6 7.8 0 0 0 2.5 0 0 0.8 0 0 0 p5(L5/6) L1 5658 10.2 6.3 0.1 1.1 0 0 0.1 0 0 0.1 0 0 0 0 0 0 0 78 0 4.1 b5 0.6 2981 0 45.5 2.3 0.2 3.3 2 7.5 0 1.1 11.6 1 0.9 1.3 2.3 2 0 11.4 7.2 0.1 0.4 nb5 0.8 2981 0 45.5 2.3 0.2 3.3 2 7.5 0 1.1 11.6 1 0.9 1.3 2.3 2 0 11.4 7.2 0.1 0.4 p6(L4) L6 13.6 3261 0 2.5 0.1 0.1 0.7 0.9 1.3 0 0.1 0.1 4.9 0 0.3 1.2 13.2 7.7 7.7 55.7 0.6 2.9 p6(L4) L5 1066 0 46.8 0.8 0.3 3.4 2.1 7.7 0 0.6 11.9 1 0.6 0.8 2.3 2.1 0 11.7 7.4 0.1 0.4 p6(L4) L4 1915 0 2.8 0.1 0.7 12.2 3.8 4.2 5.2 1.5 0.8 0.1 0 0 33.7 0 0 5.9 26 1.8 1.4 p6(L4) L2/3 121 0 63.1 5.1 4.1 0.6 7.2 8.1 0 0.6 7.8 0 0 0 2.5 0 0 0.8 0 0 0 p6(L5/6) L6 4.5 5573 0 2.5 0.1 0.1 0.7 0.9 1.3 0 0.1 0.1 4.9 0 0.3 1.2 13.2 7.8 7.8 55.7 0.6 2.9 p6(L5/6) L5 257 0 46.8 0.8 0.3 3.4 2.1 7.7 0 0.6 11.9 1 0.6 0.8 2.3 2.1 0 11.7 7.4 0.1 0.4 p6(L5/6) L4 243 0 2.8 0.1 0.7 12.2 3.8 4.2 5.2 1.5 0.8 0.1 0 0 33.7 0 0 5.9 26 1.8 1.4 p6(L5/6) L2/3 286 0 63.1 5.1 4.1 0.6 7.2 8.1 0 0.6 7.8 0 0 0 2.5 0 0 0.8 0 0 0 p6(L5/6) L1 62 10.2 6.3 0.1 1.1 0 0 0.1 0 0 0.1 0 0 0 0 0 0 0 78 0 4.1 b6 2 3220 0 2.5 0.1 0.1 0.7 0.9 1.3 0 0.1 0.1 4.9 0 0.4 1.2 13.2 7.7 7.7 55.7 0.6 2.9 nb6 2 3220 0 2.5 0.1 0.1 0.7 0.9 1.3 0 0.1 0.1 4.9 0 0.4 1.2 13.2 7.7 7.7 55.7 0.6 2.9 brainstem sensory TCs 0.5 4000 31 0 7.1 0 0 0 0 0 0 0 0 0 0 23 8 0 0 0 0 0 5 0 25.9 TCn 0.5 4000 31 0 7.1 0 0 0 0 0 0 14 3.8 0 0 0 13.2 0 0 0 0 0 0 5 25.9 TIs 0.1 3000 13.5 0 48.7 0 0 0 0 0 0 0 0 0 0 9.8 3.3 0 0 0 0.4 0 24.4 0 0 TIn 0.1 3000 13.4 0 48.7 0 0 0 0 0 0 5.8 1.6 0 0 0 5.4 0 0 0 0 0.6 0 24.4 0 TRN 0.5 4000 40 0 0 0 0 0 0 0 0 0 0 0 0 30 0 0 0 0 10 10 0 0 10