Experimental determination of three-dimensional cervical joint mobility in the avian neck

Table 1 Component loadings (eigenvectors) for the principal component analysis of vertebral measurements

Measurement	Component 1 (65.8%)	Component 2 (19.8%)	Component 3 (5.2%)
Caudal centrum height	0.367937	0.055284	−0.00162
Caudal centrum width	0.364191	−0.02796	−0.24035
Postzygapophyseal angle	0.18176	−0.53805	−0.48951
Postzygapophyseal width	0.286414	0.384656	0.311566
Cranial centrum height	0.373541	−0.08982	0.023154
Cranial centrum width	0.362724	−0.00474	−0.27056
Prezygapophyseal angle	−0.27875	0.371415	−0.6021
Prezygapophyseal width	0.257273	0.461061	−0.34749
Vertebral Height	0.30735	0.322717	0.143931
Centrum length	0.327816	−0.30974	0.166802

Percentage values indicate the proportion of variance explained by the axis. Variables loaded higher than .3 are bolded

ISSN: 1742-9994