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Related Experiment Videos

Working memory and executive functions in transient global amnesia.

Peggy Quinette1, Bérengère Guillery, Béatrice Desgranges

  • 1Inserm E0218-Université de Caen, Laboratoire de Neuropsychologie, CHU Côte de Nacre, 14033 Cannes Cedex, France.

Brain : a Journal of Neurology
|July 24, 2003
PubMed
Summary
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Transient global amnesia (TGA) spares working memory but impairs episodic memory recollection. This suggests TGA

Area of Science:

  • Neuropsychology
  • Cognitive Neuroscience

Background:

  • Transient global amnesia (TGA) is characterized by temporary memory loss.
  • A key debate concerns whether TGA affects working memory alongside episodic memory.

Purpose of the Study:

  • To comprehensively investigate working memory function during Transient Global Amnesia (TGA).
  • To clarify the dissociation between working memory and episodic memory deficits in TGA.

Main Methods:

  • Administered neuropsychological tests assessing Baddeley's working memory model components in 10 TGA patients.
  • Utilized a protocol focusing on the central executive system for seven patients.

Main Results:

  • Working memory subcomponents (phonological loop, visuo-spatial sketch pad) and executive functions were preserved.

Related Experiment Videos

  • Significant impairments were observed in the Brown-Peterson test and episodic memory recollection.
  • Reduced 'remember' judgments in episodic memory tests post-TGA.

    • Conclusions:

    • Episodic memory deficits in TGA are not due to elementary executive dysfunction.
    • The Brown-Peterson task impairment may involve long-term memory encoding processes.
    • Selective episodic memory deficits in TGA likely relate to medial temporal lobe abnormalities.