Fig. 3.

PCA plot of cross-correlations among heat nociception assays in naïve mice and heat hypersensitivity assays. Heat hypersensitivity assays show a continuous range of relationships with heat nociception, from high positive (CAP_TW) to moderate positive correlations (BV_CON and BV_HT), through correlations close to zero (ZYM_HT) to negative correlations (PNI_HT and CAR_HT) (Table 2; [19,28]). Thus, heat hypersensitivity assays are more or less genetically related to thermal nociception assays along a continuum. The proportion of total variance accounted for is 0.67. Font color reference is as in Fig. 2 legend.