Covert Visual Spatial Orienting and Saccades: Overlapping Neural Systems

We used functional magnetic resonance imaging (fMRI) to investigate the functional anatomical relationship between covert orienting of visual spatial attention and execution of saccadic eye movements. Brain areas engaged by shifting spatial attention covertly and by moving the eyes repetitively towa...

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Bibliographic Details
Published in:NeuroImage (Orlando, Fla.) Fla.), 2000-03, Vol.11 (3), p.210-216
Main Authors: Nobre, A.C., Gitelman, D.R., Dias, E.C., Mesulam, M.M.
Format: Article
Language:English
Subjects:
Adult
Attention
Attention - physiology
Brain - physiology
Brain mapping
Brain Mapping - methods
Eye movements
Eye Movements - physiology
Female
Functional Laterality
Functional magnetic resonance imaging
Humans
Magnetic Resonance Imaging
Male
Neuroimaging
Orientation - physiology
Reference Values
Saccades - physiology
Saccadic eye movements
Space life sciences
Space Perception - physiology
Visual perception
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Summary:We used functional magnetic resonance imaging (fMRI) to investigate the functional anatomical relationship between covert orienting of visual spatial attention and execution of saccadic eye movements. Brain areas engaged by shifting spatial attention covertly and by moving the eyes repetitively toward visual targets were compared and contrasted directly within the same subjects. The two tasks activated highly overlapping neural systems and showed that common parietal and frontal regions are more activated during the covert task than the overt oculomotor condition. The possible nature of the relationship between these two operations is discussed.
ISSN:1053-8119
1095-9572
DOI:10.1006/nimg.2000.0539