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[Functional memory disorders. A study of 25 patients]

K Schmidtke1

  • 1Neurologische Universitätsklinik und Forschungsschwerpunkt Neuropsychologie/Neurolinguistik, Universität Freiburg.

Der Nervenarzt
|May 1, 1995
PubMed
Summary

Functional memory disturbances, often linked to chronic stress and depression, affect professionals more than manual workers. These memory issues impact new learning, recall, and attention, despite normal test performance.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Memory disturbances are common complaints, but distinguishing functional from organic causes is crucial.
  • Patients often present with subjective memory complaints despite normal or near-normal objective test performance.
  • Dissociative amnesia and severe cognitive deficits were excluded from this study.

Purpose of the Study:

  • To investigate the characteristics of functional memory disturbances in patients without significant organic disease.
  • To identify common symptoms, psychiatric comorbidities, and demographic factors associated with these disturbances.
  • To explore the relationship between functional memory deficits and conditions like chronic stress, depression, and pseudodementia.

Main Methods:

  • A cohort of 25 patients with long-standing memory complaints and no relevant organic disease was examined.
  • Cognitive testing assessed new learning, retrograde memory, attention, wordlist learning, and psychomotor speed.
  • Psychiatric evaluation identified diagnoses and accompanying psychosomatic symptoms.

Main Results:

  • Patients predominantly experienced deficits in new learning, retrograde memory, and attention, with typical complaints of forgetting plans and temporary memory blockages.
  • A significant majority were professionals, and all cases had psychiatric findings, most commonly chronic stress disorder and depressive syndromes.
  • Objective cognitive tests, including wordlist learning and psychomotor speed, were largely within normal ranges.

Conclusions:

  • Functional memory disturbances are often associated with psychiatric conditions, particularly chronic stress and depression.
  • These disturbances present with specific subjective complaints despite preserved performance on many objective cognitive measures.
  • Understanding the interplay between psychiatric factors and memory function is key for diagnosis and treatment, with implications for differentiating from pseudodementia.

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