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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Eur J Neurosci. 2011 Jun;33(11):2139–2146. doi: 10.1111/j.1460-9568.2011.07695.x

Figure 6.

Figure 6

Binocular control of eye position in the monkey. A. Awake state. B. Sleep state. In both panels, the plotted data points are spontaneous ocular fixations. The ordinate is vertical vergence and the abscissa is horizontal vergence. When the monkey is asleep, vertical and horizontal vergence are uncorrelated and may take on positive and negative values. When the animal is awake, vertical vergence is zero and horizontal vergence is positive (convergent eye positions). From Zhou and King, 1997.