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  A fronto-posterior network involved in visual dimension changes

Pollmann, S., Weidner, R., Müller, H. J., & von Cramon, D. Y. (2000). A fronto-posterior network involved in visual dimension changes. Journal of Cognitive Neuroscience, 12(3), 480-494. doi:10.1162/089892900562156.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0010-9B3C-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-1847-7
Genre: Journal Article

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Pollmann, Stefan1, Author              
Weidner, Ralf1, Author              
Müller, Hermann J., Author
von Cramon, D. Yves1, Author              
Affiliations:
1MPI of Cognitive Neuroscience (Leipzig, -2003), The Prior Institutes, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634574              

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 Abstract: Objects characterized by a unique visual feature may pop out of their environment. When participants have to search for such “odd-one-out” targets, detection is facilitated when targets are consistently defined within the same feature dimension (e.g., color) compared with when the target dimension is uncertain (e.g., color or motion). Further, with dimensional uncertainty, there is a cost when a given target is defined in a different dimension to the preceding target, relative to when the critical dimension remains the same. Behavioral evidence suggests that a target dimension change involves a shift of attention to the new dimension. The present fMRI study revealed increased activation in the left frontopolar cortex, as well as in posterior visual areas of the dorsal and ventral streams, specific to changes in the target dimension. In contrast, activation in the striate cortex was decreased. This pattern suggests control of cross-dimensional attention shifts by the frontopolar cortex, modulating visual cortical processing by increased activation in higher-tier visual areas and suppression of activation in lower-tier areas.

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Language(s): eng - English
 Dates: 2000
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: eDoc: 239168
ISI: 000087646900010
Other: P6716
DOI: 10.1162/089892900562156
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Title: Journal of Cognitive Neuroscience
Source Genre: Journal
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Publ. Info: Cambridge, MA : MIT Press Journals
Pages: - Volume / Issue: 12 (3) Sequence Number: - Start / End Page: 480 - 494 Identifier: ISSN: 0898-929X
CoNE: /journals/resource/991042752752726