This title appears in the Scientific Report :
2001
Please use the identifier:
http://dx.doi.org/10.1006/nimg.2000.0673 in citations.
Please use the identifier: http://hdl.handle.net/2128/3822 in citations.
Deriving numerosity and shape from indentical visual displays
Deriving numerosity and shape from indentical visual displays
We presented identical displays of three to five dots in a functional magnetic resonance imaging (fMRI) experiment with normal volunteers. Two distinct directed attention tasks were performed on these displays: In one condition, subjects assessed the numerosity of the display; in the other condition...
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Personal Name(s): | Fink, G. R. |
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Marshall, J. C. / Gurd, J. / Weiss, P. H. / Zafiris, O. / Shah, J. N. / Zilles, K. | |
Contributing Institute: |
Institut für Medizin; IME |
Published in: | NeuroImage, 13 (2001) S. 46 - 55 |
Published in: |
NeuroImage Volume 13, Issue 1, January 2001, Pages 46-55 |
Imprint: |
Orlando, Fla.
Academic Press
2001
|
Physical Description: |
46 - 55 |
DOI: |
10.1006/nimg.2000.0673 |
Document Type: |
Journal Article |
Research Program: |
Zerebrale Repräsentation |
Series Title: |
NeuroImage
13 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/3822 in citations.
We presented identical displays of three to five dots in a functional magnetic resonance imaging (fMRI) experiment with normal volunteers. Two distinct directed attention tasks were performed on these displays: In one condition, subjects assessed the numerosity of the display; in the other condition, they assessed the shape of the display. Decisions based on numerosity activated differentially striate and extrastriate visual processing areas as well as left inferior frontal cortex. Decisions based on shape derived from arrangement activated differentially temporoparietal cortex bilaterally, medial posterior cingulate cortex, and left dorsolateral prefrontal cortex. These divergent neural activations in response to identical stimuli suggest that attentional mechanisms are deployed in very different ways in rapid enumeration of visual objects and in linking spatially discrete elements to one form. |