Table 5.

Number of hair cells and ratio of type I to type II hair cells, otolith organs of squirrel monkey.

			Striola		Anterolateral/ventral extrastriola		Medial/dorsal extrastriola		All zones
	N	Total No. HCs	%HC	I : II ratio	%HC	I : II ratio	%HC	I : II ratio	%HC	I : II ratio
Utriculus	4	18,200 ± 1000	7	0.59 ± 0.03	48	0.54 ± 0.05	45	0.65 ± 0.05	100	0.59 ± 0.06
				0.63 ± 0.11		0.53 ± 0.06		0.63 ± 0.11
Sacculus	2	12,100 ± 720	12	0.59 ± 0.13	29	0.55 ± 0.09	59	0.51 ± 0.11	100	0.53 ± 0.06

N, number of organs counted. Total No. HCs, total number of hair cells in organ. %HC, percentage of hair cells in zone to total number. I : II ratio, ratio of type I to type II hair cells; entries are mean ratio ± SEM. Anterolateral (utriculus) and ventral (sacculus) extrastriola. Medial (utriculus) and dorsal (sacculus) extrastriola. Two ratios are given for the utriculus, one with the line of polarity reversal (LPR) taken as the center line of the striola (upper) and the other with the LPR as the lateral border of the striola (lower).