Table 2.

β and α angles in pharyngeal wall tissue sectors

Sector	Rostral	Mid	Caudal
A. β angles (deg)
Ventral	79.4 ± 6.4**	73.0 ± 5.4**	84.2 ± 6.2**
Lateral	29.5 ± 6.1*	43.1 ± 7.4*	53.4 ± 7.4*
Control	240.6 ± 41.2	227.9 ± 40.3	216.5 ± 46.4
B. α angles (deg)
Ventral	1.6 ± 1.4	−0.3 ± 1.0	1.7 ± 1.3
Lateral	−0.6 ± 0.2	0.2 ± 0.8	0.7 ± 0.5
Control	−0.2 ± 0.2	0.2 ± 0.2	0.4 ± 0.6

A, mean β angles (1± s.e.m.) calculated for each sector in each region. Both ventral and lateral sector angles were significantly different than control (P < 0.0001); and ventral β angles marked

^(**)were larger than lateral angles marked

^(*)(P < 0.0001; two-way ANOVA excluding control sector β angles, see text. There were no significant differences in β angles between regions: rostral, mid- or caudal. B, mean α angles (± s.e.m.) in each sector in each region. α angles are referenced from the triangle centroids from each sector and, using the Cartesian coordinate system, a positive angle represents a counter-clockwise rotation. There were no significant differences in α angles across sectors (lateral, ventral and control) or pharyngeal levels (rostral, mid- and caudal).