Experimental test of visuomotor updating models that explain perisaccadic mislocalization

Journal of Vision
Sigrid M C I van Wetter, A John Van Opstal

Abstract

Localization of a brief visual target is inaccurate when presented around saccade onset. Perisaccadic mislocalization is maximal in the saccade direction and varies systematically with the target-saccade onset disparity. It has been hypothesized that this effect is either due to a sluggish representation of eye position, to low-pass filtering of the visual event, to saccade-induced compression of visual space, or to a combination of these effects. Despite their differences, these schemes all predict that the pattern of localization errors varies systematically with the saccade amplitude and kinematics. We tested these predictions for the double-step paradigm by analyzing the errors for saccades of widely varying amplitudes. Our data show that the measured error patterns are only mildly influenced by the primary-saccade amplitude over a large range of saccade properties. An alternative possibility, better accounting for the data, assumes that around saccade onset perceived target location undergoes a uniform shift in the saccade direction that varies with amplitude only for small saccades. The strength of this visual effect saturates at about 10 deg and also depends on target duration. Hence, we propose that perisaccadic misloca...Continue Reading

Citations

Jan 19, 2011·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Fred H HamkerMarkus Lappe
Nov 3, 2012·PloS One·Tom J Van GrootelA John Van Opstal
Aug 10, 2010·Vision Research·Alexander C Schütz, M Concetta Morrone
Jun 1, 2016·Frontiers in Systems Neuroscience·Yalda MohsenzadehJ Douglas Crawford
Jan 29, 2010·Journal of Neurophysiology·Tom J Van Grootel, A John Van Opstal

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