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Brain structure eigenvector values
| Brain structure | PC 1 | PC 2 | PC 3 |
| Olfactory bulbs | -0.376 | 0.350 | 0.847 |
| Telencephalon | -0.399 | -0.462 | -0.086 |
| Optic tecta | -0.382 | -0.208 | -0.104 |
| Cerebellum | -0.462 | -0.287 | -0.042 |
| Medulla | -0.431 | 0.724 | -0.513 |
| Hypothalamus | -0.392 | -0.123 | -0.010 |
Eigenvector values of the six brain structures on the three main principal component axes (PC1, PC2 and PC3) from a phylogenetic principal components analysis based on the covariance between structures.
