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Local mechanisms for the separation of optic flow-field components in the land crab, Cardisoma guanhumi: A role for motion parallax?

  • AARON P. JOHNSON (a1) (a2), W. JON. P. BARNES (a1) and MARTIN W.S. MACAULEY (a2)

Abstract

Although a number of global mechanisms have been proposed over the years that explain how crabs might separate the rotational and translational components of their optic flow field, there has been no evidence to date that local mechanisms such as motion parallax are used in this separation. We describe here a study that takes advantage of a recently developed suite of computer-generated visual stimuli that creates a three-dimensional world surrounding the crab in which we can simulate translational and rotational optic flow. We show that, while motion parallax is not the only mechanism used in flow-field separation, it does play a role in the recognition of translational optic flow fields in that, under conditions of low overall light intensity and low contrast ratio when crabs find the distinction between rotation and translation harder, smaller eye movements occur in response to translation when motion parallax cues are present than when they are absent. Thus, motion parallax is one of many cues that crabs use to separate rotational and translational optic flow by showing compensatory eye movements to only the former.

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Corresponding author

Address correspondence and reprint requests to: Aaron P. Johnson, McGill Vision Research Unit, Department of Ophthalmology, 687 Pine Avenue West, H4-14, Montreal, Quebec, Canada, H3A 1A1. E-mail: aaron.johnson1@mcgill.ca

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REFERENCES

Barnes, W.J.P. (1990). Sensory basis and functional role of eye movements elicited during locomotion in the land crab, Cardisoma guanhumi. Journal of Experimental Biology 154, 99119.
Barnes, W.J.P., Johnson, A.P., Horseman, B.G.., & Macauley, M.W.S. (2002). Computer-aided studies of vision in crabs. Marine and Freshwater Behaviour and Physiology 35, 3756.
Barnes, W.J.P. & Nalbach, H.-O. (1993). Eye movements in freely moving crabs; their sensory basis and possible role in flow-field analysis. Comparative Biochemistry and Physiology 104A, 675693.
Blanke, H., Nalbach, H.-O., & Varjú, D. (1997). Whole-field integration, not detailed analysis, is used by the crab optokinetic system to separate rotation and translation in optic flow. Journal of Comparative Physiology A 181, 383392.
Collett, T.S. (1980). Some operating rules for the optomotor system of a hoverfly during voluntary flight. Journal of Comparative Physiology 138, 271282.
Cornilleau-Pérès, V. & Droulez, J. (1993). Stereo-motion cooperation and the use of motion disparity in the visual perception of 3-D structure. Perception and Psychophysics 54, 223239.
Forman, R. & Brumbley, D. (1980). An improved capacitative position transducer for biological systems. Journal of Experimental Biology 88, 399402.
Gray, J.R., Pawlowski, V., & Willis, M.A. (2002). A method for recording behavior and multineuronal CNS activity from tethered insects flying in virtual space. Journal of Neuroscience Methods 120, 211223.
Johnson, A.P. (2001). Real-time Computer Animations and the Study of Visual Responses in Crabs. Ph.D. Thesis, University of Glasgow.
Johnson, A.P., Barnes, W.J.P., & Macauley, M.W.S. (2004). Effects of light intensity and pattern contrast on the ability of the land crab, Cardisoma guanhumi, to separate optic flow field components. Visual Neuroscience 21, 895904.
Johnson, A.P., Horseman, B.G., Barnes, W.J.P., & Macauley, M.W.S. (2002). A PC-based visual stimulus generator for behavioural and electrophysiological studies of optic flow detection. Journal of Neuroscience Methods 114, 5161.
Kern, R. & Egelhaaf, M. (2000). Optomotor course control in flies with largely asymmetrical visual input. Journal of Comparative Physiology A 186, 4555.
Kern, R., Nalbach, H.-O., & Varjú, D. (1993). Interactions of local movement detectors enhance the detection of rotation. Optokinetic experiments with the rock crab, Pachygrapsus marmoratus. Visual Neuroscience 10, 643652.
Kim, J.-N., Mulligan, K., & Sherk, H. (1997). Simulated optic flow and extrastriate cortex. I. Optic flow vs. texture. Journal of Neurophysiology 77, 554561.
Kral, K. (1998). Side-to-side head movements to obtain motion depth cues: A short review of research on the praying mantis. Behavioural Processes 43, 7177.
Land, M.F. (1995). The functions of eye movements in animals remote from man. In Eye Movement Research: Processes and Applications, ed. Kentridge, R.W. & Walker, R., pp. 6376. Amsterdam: North Holland.
Land, M.F. (1999). Motion and vision: Why animals move their eyes. Journal of Comparative Physiology A 185, 341352.
Lappe, M. (2000). Computational mechanisms for optic flow analysis in Primate Cortex. In Neuronal Processing of Optic Flow, ed. Lappe, M., pp. 235368. London: Academic Press.
Layne, J.E., Barnes, W.J.P., & Duncan, L.M.J. (2003). Mechanisms of homing in the fiddler crab Uca rapax. 2. Information sources and frame of reference for a path integration system. Journal of Experimental Biology 206, 44254442.
Li, L. & Warren, W.H., Jr. (2000). Perception of heading during rotation: Sufficiency of dense motion parallax and reference objects. Vision Research 40, 38733894.
Lindemann, J.P., Kern, R., Michaelis, C., Meyer, P., van Hateren, J.H., & Egelhaaf, M. (2003). FliMax, a novel stimulus device for panoramic and high-speed presentation of behaviourally generated optic flow. Vision Research 43, 779791.
Nalbach, H.-O. & Nalbach, G. (1987). Distribution of optokinetic sensitivity over the eyes of crabs: Its relation to habitat and possible role in flow-field analysis. Journal of Comparative Physiology A 160, 127135.
Nalbach, H.-O., Thier, P., & Varjú, D. (1993). Binocular interaction in the optokinetic system of the crab Carcinus maenas (L.): Optokinetic gain modified by bilateral image flow. Visual Neuroscience 10, 873885.
Preiss, R. (1987). Motion parallax and figural properties of depth control flight speed in an insect. Biological Cybernetics 57, 19.
Preiss, R. (1991). Separation of translation and rotation by means of eye-region specialization in flying gypsy moths (Lepidoptera: Lymantriidae). Journal of Insect Behavior 4, 209219.
Preiss, R. & Spork, P. (1995). How locusts separate pattern flow into its rotatory and translatory components (Orthoptera acrididae). Journal of Insect Behavour 8, 763779.
Rieger, J.H. & Toet, L. (1985). Human visual navigation in the presence of 3-D rotations. Biological Cybernetics 52, 377381.
Rogers, B.J. (1993). Motion parallax and other dynamic cues from depth in humans. In Visual Motion and Its Role in the Stabilization of Gaze, ed. Miles, F.A. & Wallman, J., pp. 119137. Amsterdam: Elsevier.
Sandeman, D.C. (1978). Regionalization in the eye of the crab, Leptograpsus variegatus: Eye movements evoked by a target moving in different parts of the visual field. Journal of Comparative Physiology 123, 299306.
Sobel, E.C. (1990). The locust's use of motion parallax to measure distance. Journal of Comparative Physiology A 167, 579588.
Srinivasan, M.V. (1992). How bees exploit optic flow—behavioural experiments and neural models. Philosophical Transactions of the Royal Society B 337, 253259.
Srinivasan, M.V. (1993). How insects infer range from visual motion. In Visual Motion and Its Role in the Stabilization of Gaze, ed. Miles, F.A. & Wallman, J., pp. 139156. Amsterdam: Elsevier.
Treue, S., Andersen, R.A., Ando, H., & Hildreth, E.C. (1995). Structure-from-motion: Perceptual evidence for surface interpolation. Vision Research 35, 139148.
Wallace, G.K. (1959). Visual scanning in the desert locust Schistocerca gregaria. Journal of Experimental Biology 36, 512525.
Warren, W.H., Jr. (1998). The state of flow. In High-Level Motion Processing: Computational, Neurobiological and Psychophysical Perspectives, ed. Watanabe, T., pp. 315358. London, UK: MIT Press.

Keywords

Local mechanisms for the separation of optic flow-field components in the land crab, Cardisoma guanhumi: A role for motion parallax?

  • AARON P. JOHNSON (a1) (a2), W. JON. P. BARNES (a1) and MARTIN W.S. MACAULEY (a2)

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