Stream-specific feedback inputs to the primate primary visual cortex.

In contrast, the CO-compartment location of FB projections to V1 differed significantly between thick and thin stripes, as well as between pale and thin stripes, and this was the case for all layers of FB termination ( p < 0.001 for all comparisons and all layers but L4B for which p = 0.008 for the thick versus thin comparison), except for L4B for the thin versus pale-stripe comparison which did not reach statistical significance ( p = 0.053), likely due to the low sample size (Kruskal–Wallis test with Bonferroni correction; the number of intensity bins examined over three independent injections for all thick vs. thin and pale vs. thin comparisons: L1A thick = 17, thin = 27, pale = 20; L1B thick = 15, thin = 19, pale = 28; L2/3 thick = 21, thin = 20, pale = 15; L4B thick = 12, thin = 11, pale = 18; L5/6 thick = 18, thin = 20, pale = 26).

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