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Impaired spatial information processing in aged monkeys with preserved recognition memory

P R Rapp1, M T Kansky, J A Roberts

  • 1Fishberg Research Center for Neurobiology, Department of Geriatrics and Adult Development, Mount Sinai School of Medicine, New York, NY 10029-6574, USA.

Neuroreport
|May 27, 1997
PubMed
Summary
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Aging affects spatial navigation in primates, similar to rats. Aged monkeys used response sequencing instead of external cues, unlike younger ones, suggesting conserved cognitive aging effects.

Area of Science:

  • Neuroscience
  • Cognitive Aging
  • Comparative Cognition

Background:

  • Cognitive aging research often uses rodent models.
  • Understanding primate aging is crucial for human relevance.
  • The hippocampus is vital for spatial learning.

Purpose of the Study:

  • To investigate spatial information processing in aged non-human primates.
  • To compare aging effects on spatial cognition in primates and rats.
  • To assess the conserved role of the hippocampus in spatial learning.

Main Methods:

  • Utilized a spatial navigation task in an open field with eight reward locations.
  • Employed procedures analogous to those used in rat studies.
  • Tested young and aged non-human primates.

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Main Results:

  • Young monkeys used extramaze spatial cues for navigation.
  • Aged monkeys employed a response sequencing strategy, ignoring external cues.
  • Object recognition memory remained intact in aged monkeys.

Conclusions:

  • Aging impacts spatial processing similarly in primate and rat models.
  • Response sequencing in aged primates suggests a conserved cognitive aging mechanism.
  • Established methods for testing hippocampal function in aging primates.