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Freitag, P. ; Greenlee, Mark W. ; Lacina, T. ; Scheffler, K. ; Radü, E. W.

Effect of eye movements on the magnitude of functional magnetic resonance imaging responses in extrastriate cortex during visual motion perception

Freitag, P., Greenlee, Mark W. , Lacina, T., Scheffler, K. and Radü, E. W. (1998) Effect of eye movements on the magnitude of functional magnetic resonance imaging responses in extrastriate cortex during visual motion perception. Experimental Brain Research 119 (4), pp. 409-414.

Date of publication of this fulltext: 16 Jan 2020 13:03
Article
DOI to cite this document: 10.5283/epub.41266


Abstract

We have studied the effects of pursuit eye movements on the functional magnetic resonance imaging (fMRI) responses in extrastriate visual areas during visual motion perception. Echoplanar imaging of 10–12 image planes through visual cortex was acquired in nine subjects while they viewed sequences of random-dot motion. Images obtained during stimulation periods were compared with baseline images, ...

We have studied the effects of pursuit eye movements on the functional magnetic resonance imaging (fMRI) responses in extrastriate visual areas during visual motion perception. Echoplanar imaging of 10–12 image planes through visual cortex was acquired in nine subjects while they viewed sequences of random-dot motion. Images obtained during stimulation periods were compared with baseline images, where subjects viewed a blank field. In a subsidiary experiment, responses to moving dots, viewed under conditions of fixation or pursuit, were compared with those evoked by static dots. Eye movements were recorded with MR-compatible electro-oculographic (EOG) electrodes. Our findings show an enhanced level of activation (as indexed by blood-oxygen level-dependent contrast) during pursuit compared with fixation in two extrastriate areas. The results support earlier findings on a motion-specific area in lateral occipitotemporal cortex (human V5). They also point to a further site of activation in a region approximately 12 mm dorsal of V5. The fMRI response in V5 during pursuit is significantly enhanced. This increased response may represent additional processing demands required for the control of eye movements.



Involved Institutions


Details

Item typeArticle
Journal or Publication TitleExperimental Brain Research
Publisher:Springer
Volume:119
Number of Issue or Book Chapter:4
Page Range:pp. 409-414
Date1998
InstitutionsHuman Sciences > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee
Identification Number
ValueType
10.1007/s002210050356DOI
KeywordsFunctional MRI, BOLD effect, Motion perception, Oculomotor pursuit, Human
Dewey Decimal Classification100 Philosophy & psychology > 150 Psychology
500 Science > 570 Life sciences
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgYes
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-412666
Item ID41266

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