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Distraction-spanning sustained activity during delayed recognition of locations
1Department of Psychology, University of Wisconsin-Madison, 1202 West Johnson St., Madison, WI 53706, USA. postle@wisc.edu
Neuroimage
|January 18, 2006
Summary
The Frontal Eye Fields (FEF) and other visual-spatial brain areas support spatial working memory. However, other frontal regions are not essential for retaining location information.
Area of Science:
- Cognitive Neuroscience
- Neuroimaging
Background:
- The role of frontal cortex regions in spatial working memory is debated.
- Understanding these neural systems is crucial for cognitive function research.
Purpose of the Study:
- Investigate neural systems contributing to location information retention in working memory.
- Clarify the specific roles of frontal cortex regions in spatial working memory.
Main Methods:
- Utilized a multi-delay ABCA procedure to isolate sustained delay-period activity.
- Employed functional magnetic resonance imaging (fMRI) to detect brain activity.
- Conducted single-subject and group analyses to identify reliable brain region activation.
Main Results:
- Frontal Eye Fields (FEF), Supplementary Eye Fields, and Intraparietal Sulcus reliably supported sustained activity during spatial working memory tasks.
- Activity was more pronounced in the left hemisphere.
- Superior Frontal Sulcus and dorsolateral prefrontal cortex did not show reliable sustained activity.
Conclusions:
- Findings challenge theories of specialized frontal regions for spatial working memory.
- Results support the view that spatial working memory arises from spatial attention and motor preparation processes.