Mosaic Evolution of Brainstem Motor Nuclei in Catarrhine Primates

Table 1

Multiple regression results using phylogenetic generalized least squares. Results are presented for a single consensus tree. The results of the tree block analyses are identical to the consensus tree results because the degree of phylogenetic uncertainty in our sample is negligible (see Materials and Methods for further details). CI: confidence interval (±2 standard errors); Vmo: trigeminal motor nucleus volume; VII: facial motor nucleus volume; XII: hypoglossal nucleus volume.

Dependent	𝑅^2	Independent	Slope	95% CI
VII	91%	Medulla	0.61	0.03, 1.19
		Vmo	−0.08	−0.78, 0.62
		XII	0.53	−0.07, 1.13
Vmo	86%	Medulla	0.89	0.67, 1.11
		Group size	0.09	−0.05, 0.23
XII	86%	Medulla	1.04	0.78, 1.30
		Group size	0.08	−0.08, 0.24