Journal ArticleDOI
The neural correlates of the verbal component of working memory.
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Comparisons of distribution of cerebral blood flow in these conditions localized the phonological store to the left supramarginal gyrus whereas the subvocal rehearsal system was associated with Broca's area, the first demonstration of the normal anatomy of the components of the 'articulatory loop'.Abstract:
By repeating words 'in our head', verbal material (such as telephone numbers) can be kept in working memory almost indefinitely. This 'articulatory loop' includes a subvocal rehearsal system and a phonological store. Little is known about neural correlates of this model of verbal short-term memory. We therefore measured regional cerebral blood flow, an index of neuronal activity, in volunteers performing a task engaging both components of the articulatory loop (short-term memory for letters) and a task which engages only the subvocal rehearsal system (rhyming judgement for letters). Stimuli were presented visually and the subjects did not speak. We report here that comparisons of distribution of cerebral blood flow in these conditions localized the phonological store to the left supramarginal gyrus whereas the subvocal rehearsal system was associated with Broca's area. This is, to our knowledge, the first demonstration of the normal anatomy of the components of the 'articulatory loop'.read more
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Book ChapterDOI
Chapter 11 Working memory
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Imaging Cognition II: An Empirical Review of 275 PET and fMRI Studies
Roberto Cabeza,Lars Nyberg +1 more
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References
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Journal ArticleDOI
Co-Planar Stereotaxic Atlas of the Human Brain—3-Dimensional Proportional System: An Approach to Cerebral Imaging, J. Talairach, P. Tournoux. Georg Thieme Verlag, New York (1988), 122 pp., 130 figs. DM 268
Journal ArticleDOI
Word length and the structure of short-term memory
TL;DR: This article explored the hypothesis that immediate memory span is not constant, but varies with the length of the words to be recalled, finding that words of short temporal duration are better recalled than words of long duration.
Journal ArticleDOI
Comparing functional (PET) images: the assessment of significant change.
TL;DR: In this paper, a distinction is made between using statistical parametric maps (SPMs) as images of change significance and using them to identify foci of significant change, where the SPM can be reported nonselectively as a single mathematical object with its omnibus significance.
Journal ArticleDOI
Lateralization of phonetic and pitch discrimination in speech processing
TL;DR: Processing changes in pitch produced activation of the right prefrontal cortex, consistent with the importance of right-hemisphere mechanisms in pitch perception.