Neural representations for sensory-motor control, I: Head-centered 3-D target positions from opponent eye commands

Author(s): Grossberg, S. | Guenther, F.H. |

Year: 1993

Citation: Acta Psychologica, 82, 115-138

Abstract: This article describes how corollary discharges from outflow eye movement commands can be transformed by two stages of opponent neural processing into a head-centered representation of 3-D target position. This representation implicitly defines a cyclopean coordinate system whose variables approximate the binocular vergence and spherical horizontal and vertical angles with respect to the observer s head. Various psychophysical data concerning binocular distance perception and reaching behavior are clarified by this representation. The representation provides a foundation for learning head-centered and body-centered invariant representations of both foveated and non-foveated 3-D target positions. It also enables a solution to be developed of the classical motor equivalence problem, whereby many different joint configurations of a redundant manipulator can all be used to realize a desired trajectory in 3-D space.

Topics: Biological Vision, Models: Other,

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