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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.
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| Item type | Article | ||||
| Journal or Publication Title | Experimental Brain Research | ||||
| Publisher: | Springer | ||||
|---|---|---|---|---|---|
| Volume: | 119 | ||||
| Number of Issue or Book Chapter: | 4 | ||||
| Page Range: | pp. 409-414 | ||||
| Date | 1998 | ||||
| Institutions | Human Sciences > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee | ||||
| Identification Number |
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| Keywords | Functional MRI, BOLD effect, Motion perception, Oculomotor pursuit, Human | ||||
| Dewey Decimal Classification | 100 Philosophy & psychology > 150 Psychology 500 Science > 570 Life sciences | ||||
| Status | Published | ||||
| Refereed | Yes, this version has been refereed | ||||
| Created at the University of Regensburg | Yes | ||||
| URN of the UB Regensburg | urn:nbn:de:bvb:355-epub-412666 | ||||
| Item ID | 41266 |
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