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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 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.

Titel: Peri-saccadic compression to two locations in a two-target choice saccade task
Verfasser: Lappe, Markus GND
Hamker, Fred H.
Organisation: FB 07: Psychologie und Sportwissenschaft
Dokumenttyp: Artikel
Medientyp: Text
Erscheinungsdatum: 06.10.2015
Publikation in MIAMI: 20.10.2015
Datum der letzten Änderung: 16.04.2019
Quelle: Frontiers in Systems Neuroscience 9 (2015) 135, 1-9
Schlagwörter: saccade; spatial perception; decision making; efference copy; oculomotor system
Fachgebiete: Psychologie
Lizenz: CC BY 4.0
Sprache: Englisch
Anmerkungen: Finanziert durch den Open-Access-Publikationsfonds 2015/2016 der Westfälischen Wilhelms-Universität Münster (WWU Münster).
Format: PDF-Dokument
URN: urn:nbn:de:hbz:6-58209534558
DOI: 10.3389/fnsys.2015.00135
ISSN: 1662-5137