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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. 17.

FIG. 17

Summary diagram showing the postulated effects of FPA stimulation on pursuit. Signals that drive pursuit flow from left to right, starting from “visual motion” and ending with “eye velocity.” The square box with plus sign indicates summing junctions. The boxes labeled GACC and GVEL are variable gain elements that may be under control of the FPA. The FPA injects a directional signal upstream from the 2 variable gain elements and may be able to influence the values of the 2 gain elements. The positive feedback pathway (PF) surrounding GVEL is thought to act as an integrator, and converts visual motion commands for eye acceleration into motor commands for eye velocity.