Table 1:

Cisternal length and transition zone of cranial nerves V, VII, VIII, and IX^a

	Cisternal Length	TZ
CN V: trigeminal nerve	8–15 mmb	1.13 mm (medial)b
	13.11 ± 1.12 mm (range, 11.9–15.2 mm)c	2.47 mm (lateral)b
	Motor root, 2–20 mmd	4.19 ± 0.81 mmc
CN VII: facial nerve	17.93 ± 2.29 mm (range, 14.8–20.9 mm)c	2.86 ± 1.19 mmc
	9.9 ± 3.03 mm (range, 4.78–20.13 mm) lateral sidee	1.9 ± 1.14e
CN VIII: vestibulocochlear nerve	16.48 ± 1.78 mm (range, 14.2–19.2 mm)f	11.50 ± 1.56 mmf
CN IX: glossopharyngeal nerve	16.36 ± 2.53 mm (range, 14.2–19.9 mm)c	1.51 ± 0.39 mmc

^aValues are mean ± standard deviation in mm (and range in mm).

^bPeker et al.⁸

^cGuclu et al.¹¹

^dYousry et al.¹³

^eTomii et al.⁴⁶

^fGuclu et al.⁵³