Erroneous Prosaccades in a Gap-Antisaccade-Task

Production, Correction, and Recognition
  • Burkhart Fischer
  • Stefan Gezeck
  • Annette Mokier


In an antisaccade-task subjects are required to look to the side opposite of a suddenly presented stimulus so that the voluntary and the reflexive components operate in opposite directions. In this study the gap-antisaccade- and the overlap-prosaccade-task were used to investigate the number of erroneous prosaccades in the antisaccade-task, their reaction times, and their correction times in relation to the number of express saccades a same subject produced in the overlap-prosaccade-task. Out of 234 subjects 126 were selected who produced more than 20 % errors. Among the data sets we differentiated between a “fast” group with many express saccades and a “slow” group with only a few express saccades in the overlap-prosaccade-task. Both groups showed differences in the reaction and correction time of their errors. In a second experiment we wanted to know whether the subjects (N=38) recognized their errors and whether a recognized sequence of an erroneous prosaccade and the corrective saccade is different from an unrecognized sequence. The results indicate that for each subject one has to differentiate between the disability to suppress reflex-like saccades due to an insufficient fixational control or due to a weak voluntary control or the disability to generate voluntary saccades. The erroneous prosaccades and their corrections escape the conscious perception in many cases despite large (4°+8°) and long lasting (>100 ms) changes of the retinal image. It is discussed that the perceptual spatial frame transforms differently prior to voluntary as compared to involuntary saccades.


Correction Time Conscious Perception Saccadic Reaction Time Corrective Saccade Express Saccade 


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  1. Andersen R (1995) Encoding of intention and spatial location in the posterior parietal cortex. Cerebral cortex 5: 457–469PubMedCrossRefGoogle Scholar
  2. Andersen RA, Snyder LH, Bradley DC, Xing J (1997) Multimodal representation of space in the posterior parietal cortex and its use in planning movements. Annual Review of Neuroscience 20: 303–330PubMedCrossRefGoogle Scholar
  3. Cavegn D, Biscaldi M (1996) Fixation and saccade control in an express-saccade maker. Exp Brain Res 109: 101–116PubMedGoogle Scholar
  4. Deubel H, Schneider WX, Bridgeman B (1996) Postsaccadic target blanking prevents saccadic suppression of image displacement. Vision Res 36, 985–996PubMedCrossRefGoogle Scholar
  5. Deubel H (1998) Die Rolle der visuellen Aufmerksamkeit bei der Selektion von Blickbewegungszielen. Beiträge zur ersten Tübinger Wahrnehmungskonferenz. Knirschverlag Kirchensteilinsfurt 37Google Scholar
  6. Duhamel JR, Colby C, Goldberg ME (1992) The updating of the representation of visual space in parietal cortex by intended eye movements. Science 255: 90–92PubMedCrossRefGoogle Scholar
  7. Everting S, Fischer B (1998) The antisaccade: a review of basic research and clinical studies. Neuropsychologia (in press)Google Scholar
  8. Fischer B, Biscaldi M, Gezeck S (1997) On the development of voluntary and reflexive components in saccade generation. Brain Res 754:285–297PubMedCrossRefGoogle Scholar
  9. Fischer B, Boch R (1983) Saccadic eye movements after extremely short reaction times in the monkey. Brain-Res 260:21–26PubMedCrossRefGoogle Scholar
  10. Fischer B, Gezeck S, Hartnegg K (1997) The analysis of saccadic eye movements from gap and overlap paradigms. Brain Research Protocols 2: 47–52PubMedCrossRefGoogle Scholar
  11. Fischer B, Ramsperger E (1984) Human express saccades: extremely short reaction times of goal directed eye movements. Exp Brain Res 57: 191–195PubMedCrossRefGoogle Scholar
  12. Fischer B, Weber H (1992) Characteristics of “anti” saccades in man. Exp Brain Res 89: 415–424PubMedCrossRefGoogle Scholar
  13. Fischer B, Weber H (1996) Effects of procues on error rate and reaction times of antisaccades in human subjects. Exp Brain Res 109: 507–512PubMedCrossRefGoogle Scholar
  14. Guitton D, Buchtel HA, Douglas RM (1985) Frontal lobe lesions in man cause difficulties in suppressing reflexive glances and in generating goal-directed saccades. Exp Brain Res 58: 455–472PubMedCrossRefGoogle Scholar
  15. Hallett P (1978) Primary and secondary saccades to goals defined by instructions. Vision Res 18: 1279–1296PubMedCrossRefGoogle Scholar
  16. Matin L, Matin E (1969) Visual perception of direction when voluntary saccades occur. I.Relation of visual direction of a fixation target extinguished before a saccade to a flash presented during the saccade. Perception & Psychophysics 5: 65–80CrossRefGoogle Scholar
  17. Matin L, Matin E, Pola J (1970) Visual perception of direction when voluntary saccades occur: 11. Relation of visual direction of a fixation target extinguished before a saccade to a subsequent test flash presented before the saccade. Perception & Psychophysics 8: 9–14CrossRefGoogle Scholar
  18. Mayfrank L, Mobashery M, Kimmig H, and Fischer B (1986) The role of fixation and visual attention in the occurrence of express saccades in man. European Archives of Psychiatry & Neurological Sciences 235: 269–275CrossRefGoogle Scholar
  19. Morrone CM, Ross J, Burr DC (1997) Apparent Position of Visual Targets during Real and Simulated Saccadic Eye Movements. The Journal of Neuroscience 17: 7941–7953PubMedGoogle Scholar
  20. Munoz DP, Wurtz RH (1993,a) Fixation cells in monkey superior colliculus. I. Characteristics of cell discharge. J Neurophysiol 70: 559–575PubMedGoogle Scholar
  21. Munoz DP, Wurtz RH (1993,b) Fixation cells in monkey superior colliculus. II. Reversible activation and deactivation. J Neurophysiol 70: 576–589PubMedGoogle Scholar
  22. O’Driscoll GA, Alpert NM, Matthysse SW, Levy DL, Rauch SL, and Holzman PS (1995) Functional neuroanatomy of antisaccade eye movements investigated with positron emission tomography. Proc Natl Acad Sci USA 92: 925–929PubMedCrossRefGoogle Scholar
  23. Schiller PH, Sandell JH, Maunsell JH (1987) The effect of frontal eye field and superior colliculus lesions on saccadic latencies in the rhesus monkey. J Neurophysiol 57: 1033–1049PubMedGoogle Scholar
  24. Schlag-Rey M, Amador N, Sanchez H, Schlag J (1998) Antisaccade performance predicted by neuronal activity in the supplementary eye field. Nature 390: 398–401CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • Burkhart Fischer
    • 1
  • Stefan Gezeck
    • 1
  • Annette Mokier
    • 1
  1. 1.Brain Research UnitFreiburgGermany

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