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Assessment and Communication for People with Disorders of Consciousness
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Awareness and confabulation.

Michael F Shanks1, William J McGeown2, Chiara Guerrini3

  • 1Department of Neuroscience, University of Sheffield.

Neuropsychology
|November 6, 2013
PubMed
Summary
This summary is machine-generated.

This case study of a man with mild cognitive impairment reveals that his fantastic confabulations and déjà vu experiences may stem from a fundamental disorder of awareness, challenging existing theories.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Clinical Neurology

Background:

  • Mild cognitive impairment (MCI) can present with varied symptoms.
  • Spontaneous confabulations and déjà vu experiences are complex phenomena.
  • Understanding their underlying mechanisms is crucial for diagnosis and treatment.

Observation:

  • A 74-year-old man with amnestic MCI exhibited spontaneous confabulations involving fantastical elements and reported déjà vu.
  • Neuropsychological testing revealed episodic memory deficits but intact source memory for words.
  • He misattributed a significant portion of invented and public event information to personal experience.

Findings:

  • The patient demonstrated deficits in source memory discrimination for invented and public events, despite normal autobiographical source memory.
  • Episodic memory impairment was evident, particularly in recent autobiographical recall and recognition.
  • Performance on tasks assessing stimulus frequency detection and irrelevant item suppression was within normal limits.

Implications:

  • Current theories of spontaneous confabulation do not fully explain the observed phenomena.
  • The findings suggest a potential link between confabulation, déjà vu, and a fundamental disorder of awareness.
  • Further research is needed to elucidate the neurobiological basis of these complex cognitive disturbances.