Dissociable neural correlates of reorienting within versus across visual hemifields

Neural correlates of reorienting across visual hemifields have been extensively studied, however, those of reorienting within hemifields and if there are any differences remain unclear. Here, we performed a functional magnetic resonance imaging study to identify neural correlates of reorienting with...

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Bibliographic Details
Published in:	Neuroreport Vol. 20; no. 5; pp. 497 - 501
Main Authors:	Ozaki, Takashi J, Ogawa, Seiji, Takeda, Tsunehiro
Format:	Journal Article
Language:	English
Published:	Hagerstown, MD Lippincott Williams & Wilkins, Inc 25-03-2009 Lippincott Williams & Wilkins
Subjects:	Adult Attention - physiology Biological and medical sciences Brain - physiology Brain Mapping Cues Electrooculography Eye and associated structures. Visual pathways and centers. Vision Female Fundamental and applied biological sciences. Psychology Humans Magnetic Resonance Imaging Male Orientation - physiology Reaction Time Vertebrates: nervous system and sense organs Visual Fields Visual Perception - physiology Young Adult Human reorienting Spatial attention Visual field Central nervous system superior parietal lobule Cognition Space perception Nuclear magnetic resonance imaging Encephalon Vision Parietal lobe visuospatial attention Visual attention temporoparietal junction Comparative study functional magnetic resonance imaging Functional imaging
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Summary:	Neural correlates of reorienting across visual hemifields have been extensively studied, however, those of reorienting within hemifields and if there are any differences remain unclear. Here, we performed a functional magnetic resonance imaging study to identify neural correlates of reorienting within and across hemifields using a variant of the cueing paradigm. Behavioral results showed that reorienting across hemifields showed significant validity effect, but reorienting within hemifields did not. Functional magnetic resonance imaging data revealed dissociable activations in the right posterior parietal region between reorienting within and across hemifields. The present results suggest that reorienting within hemifields differs from the ‘classical reorienting’ to some extent, whereas reorienting across hemifields does not.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0959-4965 1473-558X
DOI:	10.1097/WNR.0b013e32832771fc