Chronic stress leaves novelty-seeking behavior intact while impairing spatial recognition memory in the Y-maze

Stress. 2005 Jun;8(2):151-4. doi: 10.1080/10253890500156663.

Abstract

This experiment examined whether chronic stress disrupts novelty-seeking behavior under conditions that impair spatial memory. Rats were restrained for 6 h per day for 21 days, then tested in either a traditional spatial recognition Y-maze that requires extra-maze spatial cues to navigate or a version with salient intra-maze cues in addition to the extra-maze spatial cues. As previously shown, chronic restraint stress impaired performance on the spatial version of the Y-maze. However, chronically stressed rats performed well in the intra-maze cue version. The results indicate that the deficits in Y-maze performance following chronic stress are not attributed to neophobia, but likely reflect neurochemical and/or neurobiological changes underlying spatial memory ability.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Cues
  • Disease Models, Animal
  • Exploratory Behavior / physiology*
  • Male
  • Maze Learning / physiology*
  • Memory / physiology*
  • Rats
  • Rats, Sprague-Dawley
  • Restraint, Physical
  • Space Perception / physiology*
  • Stress, Psychological / psychology*