---
abstract: 'Severely slowed saccades in <I>spinocerebellar ataxia</I> have previously been shown to be at least partially closed-loop in nature: their long duration means that they can be modified in-flight in response to intrasaccadic target movements.  In this study, a woman with these pathologically slowed saccades could modify them in-flight in response to target movements, even when saccadic suppression of displacement prevented conscious awareness of those movements.  Thus saccadic suppression of displacement is not complete, in that it provides perceptual information that is sub-threshold to consciousness but which can still be effectively utilised by the oculomotor system.'
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creators_name:
  - family: MacAskill
    given: Michael R
    honourific: ''
    lineage: ''
  - family: Anderson
    given: Tim J
    honourific: ''
    lineage: ''
  - family: Jones
    given: Richard D
    honourific: ''
    lineage: ''
date: 2000-10
date_type: published
datestamp: 2000-12-19
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dir: disk0/00/00/11/63
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eprint_status: archive
eprintid: 1163
fileinfo: /style/images/fileicons/application_pdf.png;/1163/3/slow_saccade_proof.pdf
full_text_status: public
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keywords: |
  saccadic suppression of displacement
  slowed saccades
  visuomotor control
  feedback
  spinocerebellar ataxia
lastmod: 2011-03-11 08:54:27
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longitude: ~
metadata_visibility: show
note: ~
number: 24
pagerange: 3405-3413
pubdom: FALSE
publication: Vision Research
publisher: Elsevier Science Ltd
refereed: TRUE
referencetext: |
  Bahill, A. T., Clark, M. R., & Stark, L. (1975). The main sequence, a tool for studying human eye movements. Mathematical Biosciences, 24, 191-204.
  Becker, W. & Fuchs, A. F. (1969). Further properties of the human saccadic system: eye movements and corrective saccades with and without visual fixation points. Vision Research, 9, 1247-1258.
  Blackmore, S. J., Brelstaff, G., Nelson, K., & Troscianko, T. (1995). Is the richness of our visual world an illusion?  Transsaccadic memory for complex scenes. Perception, 24, 1075-1081.
  Boice, R. & Gardner, R. M. (1988). A computer program to generate parametric and nonparametric signal-detection parameters. Bulletin of the Psychonomic Society, 26, 365-367.
  Bridgeman, B. (1992). Conscious vs. unconscious processes: the case of vision. Theory and Psychology, 2, 73-88.
  Bridgeman, B., Hendry, D., & Stark, L. (1975). Failure to detect displacement of the visual world during saccadic eye movements. Vision Research, 15, 719-722.
  Bridgeman, B., Lewis, S., Heit, G., & Nagle, M. (1979). Relation between cognitive and motor-oriented systems of visual position perception. Journal of Experimental Psychology: Human Perception and Performance, 5, 692-700.
  Buttner, N., Geschwind, D., Jen, J. C., Perlman, S., Pulst, S. M., & Baloh, R. W. (1998). Oculomotor phenotypes in autosomal dominant ataxias. Archives Of Neurology, 55(10), 1353-1357.
  Deubel, H., Schneider, W. X., & Bridgeman, B. (1996). Postsaccadic target blanking prevents saccadic suppression of image displacement. Vision Research, 36, 985-996.
  Dodge, R. (1900). Visual perception during eye movement. Psychological Review, 7, 454-465.
  Fuchs, A. F., Reiner, D., & Pong, M. (1996). Transfer of gain changes from targeting to other types of saccade in the monkey: constraints on possible sites of saccadic gain adaptation. Journal of Neurophysiology, 76, 2522-2535.
  Goodale, M. A., Milner, A. D., Jakobson, L. S., & Carey, D. P. (1991). A neurological dissociation between perceiving objects and grasping them. Nature, 349, 154-156.
  Hallett, P. E. & Lightstone, A. D. (1976). Saccadic eye movements towards stimuli triggered by prior saccades. Vision Research, 16, 99-106.
  Henson, D. B. (1978). Corrective saccades: effects of altering visual feedback. Vision Research, 18, 63-67.
  Lappe, M., Awater, H., & Krekelberg, B. (2000). Postsaccadic visual references generate presaccadic compression of space. Nature, 403, 892-895.
  Leigh, R. J. & Zee, D. S. (1999). The neurology of eye movements. (3rd ed.). Philadelphia: Oxford University Press.
  Lemij, H. G. & Collewijn, H. (1989). Differences in accuracy of human saccades between stationary and jumping targets. Vision Research, 29, 1737-1748.
  MacAskill, M. R., Anderson, T. J., & Jones, R. D. (1999). She seldom sees shifts: severely slowed saccades still show significant saccadic suppression [Abstract]. International Journal of Neuroscience, 97, 269.
  MacAskill, M. R., Muir, S. R., & Anderson, T. J. (1999). Saccadic suppression and adaptation: revisiting the methodology. In W. Becker, H. Deubel, & T. Mergner (Eds.), Current oculomotor research: physiological and psychological aspects (pp. 93-96). New York: Plenum.
  Marcel, A. J. (1998). Blindsight and shape perception: deficit of visual consciousness or of visual function? Brain, 121, 1565-1588.
  McConkie, G. W. & Currie, C. B. (1996). Visual stability across saccades while viewing complex pictures. Journal of Experimental Psychology: Human Perception and Performance, 22, 563-581.
  McLaughlin, S. C. (1967). Parametric adjustment in saccadic eye movements. Perception & Psychophysics, 2, 359-362.
  McNicol, D. (1972). A primer of signal detection theory. London: George Allen & Unwin.
  Perenin, M. T. & Rossetti, Y. (1996). Grasping without form discrimination in a hemianopic field. Neuroreport, 7, 793-797.
  Pöppel, E., Held, R., & Frost, D. (1973). Residual visual function after brain wounds involving the central visual pathways in man. Nature, 243, 295-296.
  Sanders, M. D., Warrington, E. K., Marshall, J., & Weiskrantz, L. (1974). "Blindsight": vision in a field defect. The Lancet, I, 707-708.
  Stoffregen, T. A. (1985). Flow structure versus retinal location in the optical control of stance. Journal of Experimental Psychology: Human Perception and Performance, 11, 554-565.
  Stoffregen, T. A. (1986). The role of optical velocity in the control of stance. Perception & Psychophysics, 39, 355-360.
  Zee, D. S., Optican, L. M., Cooke, J. D., Robinson, D. A., & Engel, W. K. (1976). Slow saccades in spinocerebellar degeneration. Archives of Neurology, 33, 243-251.
  Zeman, A. (1998). The consciousness of sight. British Medical Journal, 317, 1696-1697.
  Zihl, J. (1980). "Blindsight": improvement of visually guided eye movement by systematic practice in patients with cerebral blindness. Neuropsychologia, 18, 71-77.
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reportno: ~
rev_number: 12
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source: ~
status_changed: 2007-09-12 16:36:42
subjects:
  - neuro-neu
  - percep-cog-psy
  - psy-phys
succeeds: ~
suggestions: ~
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thesistype: ~
title: Suppression of displacement in severely slowed saccades
type: journalp
userid: 1179
volume: 40
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