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Marshuetz C, Smith EE, Jonides J, DeGutis J, Chenevert TL.

Order Information in Working Memory: fMRI Evidence for Parietal and Prefrontal Mechanisms

fMRIDC Accession Number: 2-2000-1117M
Journal of Cognitive Neuroscience 2000 Nov ;12(suppl. 2): p.130-144
PubMed ID: 11506653 (off-site link)
 Study Meta-Data
NIA grant number 5R01AG013027-04

Working memory is thought to include a mechanism that allows for the coding of order information. One question of interest is how order information is coded, and how that code is neurally implemented. Here we report both behavioral and fMRI findings from an experiment which involved comparing to tasks, an item-memory task and an order-memory task. In each case, five letters were presented for storage, followed after a brief interval by a set of probe letters. In the case of the item-memory task, the two letters were identical, and the subject responded to the question. "Was this letter one of the items you saw?" In case of the order-memory task, the letters were different, and subjects responded to the question, "Are these two letters in the order in which you saw them?" Behaviorally, items that were further apart in the sequence elicited in the Order condition included parietal and prefrontal cortex. Parietal activations overlapped those involved in number processing, leading to the suggestion that the underlying representation of order and numbers may share a common process, coding for magnitude.

Supplemental Information

Language: English
fMRIDC Comments: Stimuli order information Dataset Size 6.9G Available on 8 CDs or 2 DVDs
Country: USA
Magnetic Field Strength: 1.5T
Scanner Manufacturer: GE Signa EchoSpeed LX
Analysis Software: SPM 99
Cognitive Domain: Working Memory
Subjects: 12
Age Range: Not given in paper
Functional Runs: 7
Has anatomical data
Has raw image data
Comments on Order Information in Working Memory: fMRI Evidence for Parietal and Prefrontal Mechanisms by interch on December 24, 2008 @23:53
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