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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. und 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), S. 409-414.

Veröffentlichungsdatum dieses Volltextes: 16 Jan 2020 13:03
Artikel
DOI zum Zitieren dieses Dokuments: 10.5283/epub.41266


Zusammenfassung

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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Details

DokumentenartArtikel
Titel eines Journals oder einer ZeitschriftExperimental Brain Research
Verlag:Springer
Band:119
Nummer des Zeitschriftenheftes oder des Kapitels:4
Seitenbereich:S. 409-414
Datum1998
InstitutionenHumanwissenschaften > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee
Identifikationsnummer
WertTyp
10.1007/s002210050356DOI
Stichwörter / KeywordsFunctional MRI, BOLD effect, Motion perception, Oculomotor pursuit, Human
Dewey-Dezimal-Klassifikation100 Philosophie und Psychologie > 150 Psychologie
500 Naturwissenschaften und Mathematik > 570 Biowissenschaften, Biologie
StatusVeröffentlicht
BegutachtetJa, diese Version wurde begutachtet
An der Universität Regensburg entstandenJa
URN der UB Regensburgurn:nbn:de:bvb:355-epub-412666
Dokumenten-ID41266

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