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Related Experiment Videos

Psychomotor slowing and subcortical-type dysfunction in depression.

R P Hart1, J A Kwentus

  • 1Department of Psychiatry, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298.

Journal of Neurology, Neurosurgery, and Psychiatry
|October 1, 1987
PubMed
Summary

Elderly patients with major depression showed psychomotor slowing but maintained normal information processing speed. This suggests depression

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Geriatrics

Background:

  • Major depression in the elderly can present with cognitive impairments.
  • Distinguishing depression from neurological disorders with similar symptoms is clinically important.

Purpose of the Study:

  • To investigate cognitive processing speed in elderly patients with major depression.
  • To differentiate depression from subcortical neurological disorders using cognitive tasks.

Main Methods:

  • Elderly patients with major depression and healthy controls completed the Sternberg short-term memory scanning task.
  • The Wechsler Adult Intelligence Scale (WAIS) Digit Symbol test was also administered.

Main Results:

  • Depressed patients exhibited psychomotor slowing on both cognitive tasks.
  • Response latency in relation to memory set size remained normal in depressed patients on the Sternberg task.
  • This pattern differentiates depression from certain subcortical neurological disorders.

Conclusions:

  • Psychomotor slowing in depression, with preserved central information processing speed, may stem from motivational deficits.
  • Cognitive-behavioral slowing is not exclusive to neurological conditions and requires careful interpretation in depression.

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