Peri-saccadic compression to two locations in a two-target choice saccade task

When visual stimuli are presented at the onset of a saccadic eye movement they are seen compressed onto the target location of the saccade. This peri-saccadic compression is believed to result from internal feedback pathways between oculomotor and visual areas of the brain. This feedback enhances vi...

Authors: Lappe, Markus
Hamker, Fred H.
Division/Institute:FB 07: Psychologie und Sportwissenschaft
Document types:Article
Media types:Text
Publication date:2015
Date of publication on miami:20.10.2015
Modification date:23.01.2020
Edition statement:[Electronic ed.]
Source:Frontiers in Systems Neuroscience 9 (2015) 135, 1-9
Subjects:saccade; spatial perception; decision making; efference copy; oculomotor system
DDC Subject:150: Psychologie
License:CC BY 4.0
Language:Englisch
Notes:Finanziert durch den Open-Access-Publikationsfonds 2015/2016 der Westfälischen Wilhelms-Universität Münster (WWU Münster).
Format:PDF document
ISSN:1662-5137
URN:urn:nbn:de:hbz:6-58209534558
Other Identifiers:DOI: 10.3389/fnsys.2015.00135
Permalink:https://nbn-resolving.de/urn:nbn:de:hbz:6-58209534558
Digital documents:fnsys-09-00135.pdf

When visual stimuli are presented at the onset of a saccadic eye movement they are seen compressed onto the target location of the saccade. This peri-saccadic compression is believed to result from internal feedback pathways between oculomotor and visual areas of the brain. This feedback enhances vision around the saccade target at the expense of localization ability in other regions of the visual field. Although saccades can be targeted at only one object at a time, often multiple potential targets are available in a visual scene, and the oculomotor system has to choose which target to look at. If two targets are available, preparatory activity builds-up at both target locations in oculomotor maps. Here we show that, in this situation, two foci of compression develop, independent of which of the two targets is eventually chosen for the saccade. Our results suggest that theories that use oculomotor feedback as efference copy signals for upcoming eye movements should take the possibility into account that multiple feedback signals from potential targets may occur in parallel before the execution of a saccade.