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Brain structure loadings on the first principal component
| Brain structure | Loadings on PC1 |
| Olfactory bulbs | 0.86 |
| Telencephalon | 0.94 |
| Optic tecta | 0.96 |
| Cerebellum | 0.98 |
| Medulla | 0.88 |
| Hypothalamus | 0.98 |
Loadings of the individual structures on the first principal component of a phylogenetic principal components analysis. These loadings indicate to what extent variance in brain size explains variance in structure volume.
