Abstract:
:In this study, we examined possible differences in brain activation between smooth pursuit and optokinetic reflexive (OKR) eye movements using functional magnetic resonance imaging (fMRI). Eighteen healthy subjects performed two different eye movement paradigms. In the first paradigm, smooth pursuit eye movements were evoked by a single moving dot. In the second paradigm, optokinetic eye movements without a foveal smooth pursuit component were evoked by a moving pattern of multiple dots with a limited lifetime. As expected, the two eye movement systems show overlapping pathways, but the direct comparison of the activation patterns between the two experiments showed that the frontal eye field, MT/V5 and cerebellar area VI appear to be more activated during smooth pursuit than during optokinetic eye movements. These results showed that the smooth pursuit and optokinetic eye movement systems can be differentiated with fMRI using limited lifetime dots as an effective OKR stimulus.
journal_name
Clin Physiol Funct Imagingjournal_title
Clinical physiology and functional imagingauthors
Schraa-Tam CK,van der Lugt A,Smits M,Frens MA,van Broekhoven PC,van der Geest JNdoi
10.1111/j.1475-097X.2009.00858.xsubject
Has Abstractpub_date
2009-07-01 00:00:00pages
245-54issue
4eissn
1475-0961issn
1475-097Xpii
CPF858journal_volume
29pub_type
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