Computed extraocular muscle activity during blinks

The neural commands for maintaining static Listing's positions were identified using a detailed model of extraocular muscle based on Miller and Shamaeva (Orbit 1.5 gaze mechanics simulation 1995). The commands were approximately separable, suggesting a simple control law whereby independent horizontal and vertical commands are combined to generate tertiary positions. Tests showed that this control law (i) generated Listing' s positions to reasonable accuracy over+/-30 deg, provided pulleys were represented in the model; (ii) if driven by retinal coordinates, produced errors close to the theoretical minimum for a commutative system. The proposed commands appear consistent with electrophysiological evidence.

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A simple control law generates Listing's positions in a detailed model of the extraocular muscle system

Porrill

Warren

Dean

2000

Vision Research

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Computed extraocular muscle activity during blinks

Abstract: The rotations and retractions of the eyeball due to co-contraction of the extraocular muscles are investigated using a model of the mechanics of the orbital plant. The hypothesis that the rotational movements are secondary to globe retraction is not supported.

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A simple control law generates Listing's positions in a detailed model of the extraocular muscle system

A simple control law generates Listing's positions in a detailed model of the extraocular muscle system

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