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Publications: Intrasaccadic suppression - Guez 2013

Name

Intrasaccadic suppression - Guez 2013 

Title

Intrasaccadic suppression is dominated by reduced detector gain 

Abstract

Human vision requires fast eye movements (saccades).
Each saccade causes a self-induced motion signal, but we
are not aware of this potentially jarring visual input.
Among the theorized causes of this phenomenon is a
decrease in visual sensitivity before (presaccadic
suppression) and during (intrasaccadic suppression)
saccades. We investigated intrasaccadic suppression
using a perceptual template model (PTM) relating visual
detection to different signal-processing stages. One stage
changes the gain on the detector’s input; another
increases uncertainty about the stimulus, allowing more
noise into the detector; and other stages inject noise
into the detector in a stimulus-dependent or
-independent manner. By quantifying intrasaccadic
suppression of flashed horizontal gratings at varying
external noise levels, we obtained threshold-versusnoise
(TVN) data, allowing us to fit the PTM.We tested if
any of the PTM parameters changed significantly
between the fixation and saccade models and could
therefore account for intrasaccadic suppression. We
found that the dominant contribution to intrasaccadic
suppression was a reduction in the gain of the visual
detector.We discuss how our study differs from previous
ones that have pointed to uncertainty as an underlying
cause of intrasaccadic suppression and how the
equivalent noise approach provides a framework for
comparing the disparate neural correlates of saccadic
suppression.

Authors

Jon Guez, Adam P. Morris, Bart Krekelberg 

Bibliographic Information

Journal of Vision 13(8):4, 1–11 

Publication Date

7/3/2013 

PubType

Journal 

Year

2,013 

Reference

Jon Guez, Adam P. Morris, Bart Krekelberg.Intrasaccadic suppression is dominated by reduced detector gain.Journal of Vision 13(8):4, 1–11 (2013) 

Publication

Intrasaccadic suppression is dominated by reduced detector gain : Journal of Vision 13(8):4, 1–11 (2013) 
Content Type: Abstract
Created at 7/2/2013 15:21  by Jon Guez 
Last modified at 7/31/2013 4:25  by Bart Krekelberg