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The search for the phonological store: from loop to convolution.

Bradley R Buchsbaum1, Mark D'Esposito

  • 1Department of Psychology, University of California, Berkeley, CA 94720-3190, USA. bbuchsbaum@berkeley.edu

Journal of Cognitive Neuroscience
|January 19, 2008
PubMed
Summary
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The phonological loop, a key component of working memory, is re-examined. Evidence suggests the phonological store isn't a single brain region but an integrated network for speech perception and production.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psycholinguistics

Background:

  • The phonological loop is a foundational model in working memory research.
  • Early research integrated behavioral and neuropsychological data.
  • Functional brain imaging expanded the study of the phonological loop.

Purpose of the Study:

  • To review the neuroimaging evidence for the phonological store.
  • To challenge the localization of the phonological store to a single brain region.
  • To propose an alternative model for phonological short-term memory.

Main Methods:

  • Review of functional neuroimaging studies.
  • Integration of data from neurology and cognitive psychology.
  • Analysis of evidence for and against localized brain regions.

Related Experiment Videos

Main Results:

  • Neuroimaging studies initially localized the phonological store to parietal and later temporal cortex.
  • Evidence does not support the phonological store as a single, discrete brain region.
  • Phonological short-term memory appears to arise from distributed neural processes.

Conclusions:

  • The theoretical construct of the phonological store requires reconceptualization.
  • Phonological short-term memory emerges from the integrated neural processes of speech perception and production.
  • A network-based approach is necessary to understand the neural basis of phonological short-term memory.