HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) All Versions of this Article: 91/6/2457    most recent 00821.2003v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (7) Citing Articles via Google Scholar Google Scholar Articles by Awater, H. Articles by Lappe, M. Search for Related Content PubMed PubMed Citation Articles by Awater, H. Articles by Lappe, M.

Perception of Visual Space at the Time of Pro- and Anti-Saccades

Department of Zoology and Neurobiology, Ruhr University Bochum, 44780 Bochum, Germany; and Institute of Psychology II, Westfaelische Wilhelms–University Muenster, 48149 Muenster, Germany

Submitted 21 August 2003; accepted in final form 8 February 2004

The localization of peri-saccadically flashed objects shows two types of errors: first, a uniform shift in saccade direction, and second, a compression of visual space around the saccade target. Whereas the uniform shift occurs when the experiment is performed in complete darkness compression occurs when additional visual references are available. Thus peri-saccadic mislocalization contains motor and visual components. To distinguish between both factors we compared peri-saccadic localization errors during pro- and anti-saccades. In the case of anti-saccades, the visual cue that elicits the saccade and the actual eye movement are in opposite directions. We asked whether peri-saccadic compression can be observed with anti-saccades, and if so, whether the compression is directed toward the visual cue or follows the actual eye movement. In blocked trials, subjects performed saccades either toward a visual cue (pro-saccade) or to the mirrored position opposite to a visual cue (anti-saccade). Peri-saccadically, we flashed a thin vertical bar at one of four possible locations. Subjects had to indicate the perceived position of the bar with a mouse pointer about 500 ms after the saccade. Experiments were performed in complete darkness and with visual references. Peri-saccadic mislocalizations occurred during anti-saccades. The mislocalizations were very similar for pro- and anti-saccades in magnitude and direction. For both, pro- and anti-saccades, mislocalizations were directed toward the actual eye movement and not the visual cue.

This article has been cited by other articles:

				H. Awater and M. Lappe Mislocalization of Perceived Saccade Target Position Induced by Perisaccadic Visual Stimulation J. Neurosci., January 4, 2006; 26(1): 12 - 20. [Abstract] [Full Text] [PDF]

				W. P. Medendorp, H. C. Goltz, and T. Vilis Remapping the Remembered Target Location for Anti-Saccades in Human Posterior Parietal Cortex J Neurophysiol, July 1, 2005; 94(1): 734 - 740. [Abstract] [Full Text] [PDF]