Universität zu Köln

Zimmermann, Eckart, Weidner, Ralph ORCID: 0000-0002-4502-0166 and Fink, Gereon R. ORCID: 0000-0002-8230-1856 (2017). Spatiotopic updating of visual feature information. J. Vision, 17 (12). ROCKVILLE: ASSOC RESEARCH VISION OPHTHALMOLOGY INC. ISSN 1534-7362

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Abstract

Saccades shift the retina with high-speed motion. In order to compensate for the sudden displacement, the visuomotor system needs to combine saccade-related information and visual metrics. Many neurons in oculomotor but also in visual areas shift their receptive field shortly before the execution of a saccade (Duhamel, Colby, & Goldberg, 1992; Nakamura & Colby, 2002). These shifts supposedly enable the binding of information from before and after the saccade. It is a matter of current debate whether these shifts are merely location based (i.e., involve remapping of abstract spatial coordinates) or also comprise information about visual features. We have recently presented fMRI evidence for a feature-based remapping mechanism in visual areas V3, V4, and VO (Zimmermann, Weidner, Abdollahi, & Fink, 2016). In particular, we found fMRI adaptation in cortical regions representing a stimulus' retinotopic as well as its spatiotopic position. Here, we asked whether spatiotopic adaptation exists independently from retinotopic adaptation and which type of information is behaviorally more relevant after saccade execution. We first adapted at the saccade target location only and found a spatiotopic tilt aftereffect. Then, we simultaneously adapted both the fixation and the saccade target location but with opposite tilt orientations. As a result, adaptation from the fixation location was carried retinotopically to the saccade target position. The opposite tilt orientation at the retinotopic location altered the effects induced by spatiotopic adaptation. More precisely, it cancelled out spatiotopic adaptation at the saccade target location. We conclude that retinotopic and spatiotopic visual adaptation are independent effects.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zimmermann, Eckart UNSPECIFIED UNSPECIFIED UNSPECIFIED Weidner, Ralph UNSPECIFIED orcid.org/0000-0002-4502-0166 UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-216835
DOI:	10.1167/17.12.6
Journal or Publication Title:	J. Vision
Volume:	17
Number:	12
Date:	2017
Publisher:	ASSOC RESEARCH VISION OPHTHALMOLOGY INC
Place of Publication:	ROCKVILLE
ISSN:	1534-7362
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SACCADIC EYE-MOVEMENTS; OPTIMAL INTEGRATION; FRONTAL-CORTEX; REPRESENTATION; ORIENTATION; ADAPTATION; PERCEPTION; MECHANISMS; STABILITY; PARIETAL Multiple languages Ophthalmology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21683