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. 2005 Feb 9;25(6):1375–1386. doi: 10.1523/JNEUROSCI.3902-04.2005

Figure 3.

Figure 3.

Frontal lobe input to the digit representations of M1 and PMd (R12). A, Location and density of neurons labeled after DY injections into the digit representation of M1. Yellow shading around the injection site in M1 indicates zones 1 and 2 of the spread of the DY. The region surrounding the injection sites where neurons were too dense to plot is indicated by gray shading. B, Location and density of neurons labeled in the frontal lobe after FB injections into the digit representation of the PMd. Blue shading around the injection site in the PMd indicates zones 1 and 2 of the spread of FB. C, Overlap of the input to the digit representations of the PMd and M1. Red shading (overlap bins) indicates bins that have a high density of cells projecting to each injection site. Yellow shading represents bins that have a high density of cells projecting to M1. Blue shading represents bins that have a high density of cells projecting to the PMd. See Materials and Methods for additional details. Abbreviations and conventions are as in Figures 1 and 2.