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. Author manuscript; available in PMC: 2008 Nov 12.
Published in final edited form as: J Neurophysiol. 2002 Feb;87(2):802–818. doi: 10.1152/jn.00409.2001

FIG. 1.

FIG. 1

Criteria for selection of stimulation sites. A and B: activity of a pursuit-related neuron with ipsiversive (rightward) directional preference during tracking of step-ramp target motion to the right (A) or left (B) at 20°/s. From top to bottom, traces are superimposed trials of horizontal eye position and horizontal eye velocity and superimposed rasters and spike density, aligned on the onset of target motion. Rapid deflections associated with small corrective saccades were removed from eye-velocity traces during the maintenance of pursuit. C and D: superimposed trials of the smooth eye movements evoked by electrical stimulation (50 μA, 333 Hz) in the dark (C) and during ongoing pursuit (D). The bold horizontal lines labeled “stim” show the duration of microstimulation.