Universität zu Köln

Bonkhoff, Anna K., Zimmermann, Eckart and Fink, Gereon R. ORCID: 0000-0002-8230-1856 (2017). Veridical stimulus localization is linked to human area V5/MT+ activity. Neuroimage, 156. S. 377 - 388. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1095-9572

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Abstract

How the brain represents visual space is an unsolved mystery. Spatial localization becomes particularly challenging when visual information processing is briefly disrupted, as in the case of saccadic eye movements, blinks, or visual masks. As we have recently reported, a compression of visual space, illustrated by displacements of shortly flashed stimuli, can be observed in the temporal vicinity of masking stimuli during ocular fixation (Zimmermann et al., 2013). We here aimed at investigating the neural mechanisms underlying these displacements using functional magnetic resonance imaging. On the behavioral level, we detected significant stimulus displacement when visual masks were simultaneously presented. At the neural level, we observed decreased human motion complex V5/MT+ activation associated with these displacements: When comparing trials with a perceived stimulus shift in space to trials of veridical perception of stimulus localization, human V5/MT+ was significantly less activated although no differences in perceived motion can account for this. Data suggest an important role of human V5/MT+ in the process of spatial localization of briefly presented objects and thus extend current concepts of the functions of human V5/MT+.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bonkhoff, Anna K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zimmermann, Eckart UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-224274
DOI:	10.1016/j.neuroimage.2017.05.010
Journal or Publication Title:	Neuroimage
Volume:	156
Page Range:	S. 377 - 388
Date:	2017
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1095-9572
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SACCADIC EYE-MOVEMENTS; HUMAN VISUAL-CORTEX; HUMAN EXTRASTRIATE CORTEX; APPARENT MOTION; HUMAN MT; PERISACCADIC MISLOCALIZATION; NEURONAL MECHANISMS; FUNCTIONAL-ANALYSIS; STATIONARY OBJECTS; SPATIAL ATTENTION Multiple languages Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22427