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Table 1 Summed loadings of landmarks from each vertebra on the whole-column PCA

From: Adaptation and constraint in the evolution of the mammalian backbone

  Tot Var. T1 Mid-T Dia Ant L Last L
PC1 30.0% 22.0% 23.2% 16.1% 20.6% 18.2%
PC2 13.5% 17.2% 9.6% 17.2% 29.6% 26.4%
PC3 7.5% 25.9% 23.5% 20.2% 16.3% 14.1%
  1. Tot var. Total variation explained by that PC, T1 First thoracic, Mid-T mid-thoracic, Dia diaphragmatic, Ant L anterior lumbar, Last L last lumbar