Fig. 1.

Contour charts displaying the distribution of 2-deoxyglucose uptake across the entire glomerular layer. All patterns of glomerular activity are presented as dorsal-centered charts instead of the ventral-centered format we have used in our prior publications. Each chart shows activity averaged across both bulbs of all rats exposed to a given odorant. Relative uptake is color coded in units of z-score as shown in the key. The orientation of these contour charts with respect to olfactory bulb anatomy is shown at the right end of the second row. Odorants are identified by chemical structure and by a unique number identifying the exposure as shown in Table 1. The right panel of the first row displays the results of ANOVA tests expressing differences in average z-score values across 30 previously defined glomerular modules. Glomerular modules are outlined and color-coded by p value: yellow, 0.05 > p > 0.01; orange, 0.01 > p > 0.001; red, p < 0.001. The ANOVA results were analyzed further by using FDR analysis to correct for the fact that 30 different tests were performed. Modules that were significantly different after FDR correction are indicated with asterisks. These areas help to indicate the possible spatial locations of areas activated differently by the different odorants.