Table 2.

Variability of responses of individual neurons

	CCW		CW		Total
	≥2 SD	<2 SD	≥2 SD	<2 SD
A. Smooth pursuit only
Upright–RED	4	11	2	9	26
Upright–LED	2	11	2	12	27
B. Optic flow only
Upright–RED	0	10	2	8	20
Upright–LED	2	14	2	4	22
C. Smooth pursuit + optic flow
Upright–RED	3	13	4	9	29
Upright–LED	2	16	2	11	31
D. Total	13	75	14	53	155

Numbers of neurons are shown for each task condition (A–C) whose preferred directions were shifted ≥2 or <2 SD of the preferred directions of individual neurons. See text for further explanation.