Figure 5.

Quantification of bilateral anterior/posterior concentration of voxel weights for the music-selective components inferred in nonmusicians and musicians separately. A: music component voxel weights, reproduced from Ref. 7. See materials and methods for details concerning the analysis and plotting conventions from our previous paper. B: fifteen standardized anatomical parcels were selected from Ref. 64, chosen to fully encompass the superior temporal plane and superior temporal gyrus (STG). To come up with a small set of ROIs to use to evaluate the music component weights in our current study, we superimposed these anatomical parcels onto the weights of the music component from our previously published study (7), and then defined ROIs by selecting sets of the anatomically defined parcels that correspond to regions of high (anterior nonprimary, posterior nonprimary) vs. low (primary, lateral nonprimary) music component weights. The anatomical parcels that comprise these four ROIs are indicated by the brackets and outlined in black on the cortical surface. C: mean music component weight across all voxels in each of the four anatomical ROIs, separately for each hemisphere, and separately for our previous study (n = 10; left, gray shading), nonmusicians (n = 10; center, green shading), and musicians (n = 10; right, blue shading). A repeated-measures ROI × hemisphere ANOVA was conducted for each group separately. Error bars plot one standard error of the mean across participants. Brackets represent pairwise comparisons that were conducted between ROIs with expected high vs. low component weights, averaged over hemisphere. See Table 3 for full results of pairwise comparisons, and Fig. A9 for component weights from all 15 anatomical parcels. *Significant at P < 0.05, two-tailed; **Significant at P < 0.01, two-tailed; ***Significant at P < 0.001, two-tailed; ****Significant at P < 0.0001, two-tailed. Note that because of our prior hypotheses and the significance of the omnibus F test, we did not correct for multiple comparisons. LH, left hemisphere; RH, right hemisphere; ROI, region of interest.