Sensitivity of control parameters in a model of saccadic eye tracking and estimation of resultant nervous activity

✍ Scribed by Michael R. Clark; Lawrence Stark

• Publisher: Springer
• Year: 1976
• Tongue: English
• Weight: 940 KB
• Volume: 38
• Category: Article
• ISSN: 1522-9602
• DOI: 10.1016/s0092-8240(76)80042-0

✦ Synopsis

A model for the extraocular plant of the human visual eye tracking mechanism is discussed. Its sensitivity to variation of controller signal nervous activity is studied in order to determine the type of activity that yields realistic simulations characteristic of typical saccadic eye movements.

I. Introduction.

The visual eye tracking mechanism is responsible for producing (1) saccades that position the foveal center of the retina on the target;

(2) smooth pursuit movements that keep a moving target on the foveal center; and (3) fusional vergence movements that create a single fused target image in both eyes. This system can be characterized as having a sensory portion in the retina and visual cortex, where the error between the target and the foveal center is detected; a controller segment in the visual, association and motors centers of the brain, where the error is transformed into resultant nervous activity; and the extraocular plant, consisting of the extraoeular muscles, globe and orbit, which responds to nervous activity that causes the muscles to move the globe in its surrounding orbit.