Hostname: page-component-7b7567c8c-fvjsw Total loading time: 0 Render date: 2026-11-15T09:29:06.218Z Has data issue: false hasContentIssue false

Sensitivity to full-field visual movement compatible with head rotation: Variations among axes of rotation

Published online by Cambridge University Press:  02 June 2009

Laurence R. Harris
Affiliation:
Department of Psychology, York University, Toronto, Ontario M3J 1P3, Canada
Lori A. Lott
Affiliation:
Department of Psychology, York University, Toronto, Ontario M3J 1P3, Canada

Abstract

Movement detection thresholds for full-field visual motion about various axes were measured in three subjects using a two-alternative forced-choice staircase method. Thresholds for 1-s exposures to rotation about different rotation axes varied significantly over the range 0.139 ± 0.05 deg/s to 0.463 ± 0.166 deg/s. The highest thresholds were found in response to rotation about axes closely aligned to the line of sight. Variations among the thresholds for different axes could not be explained by different movement patterns in the fovea or variations in motion sensitivity with eccentricity. The variations can be well simulated by a three-channel model for coding the axis and velocity of full-field visual motion. A three-channel visual coding system would be well suited for extracting information about self-rotation from a complex pattern of retinal image motion containing components due to both rotation and translation. A three-channel visual motion system would also be readily compatible with vestibular information concerning self-rotation arising from the semicircular canals.

Information

Type
Research Articles
Copyright
Copyright © Cambridge University Press 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable