Fig. 5.
PCA plot illustrating cross-correlations among inbred strain means for mechanical sensitivity and mechanical hypersensitivity assays, illustrating the first two unrotated principle components. Mechanical hypersensitivity in the two newly added assays (PACVF and SNIVF) is not highly positively related with any of the other assays of mechanical hypersensitivity, indicating that mechanical hypersensitivity assays do not comprise a single pain type. The proportion of total variance accounted for by the two factors is 0.79. Font color reference is as in Fig. 2 legend.