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Related Experiment Videos

Distinctive stress effects on learning during puberty.

Georgia E Hodes1, Tracey J Shors

  • 1Department of Psychology and Center for Collaborative Neuroscience, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854, USA.

Hormones and Behavior
|May 12, 2005
PubMed
Summary

Stress impacts adolescent rats

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Endocrinology

Background:

  • Puberty involves significant physical and cognitive development.
  • Understanding how stress affects developing brains is crucial.

Purpose of the Study:

  • To investigate the effects of acute stress on cognitive function and hormones in male and female rats before, during, and after puberty.
  • To identify sex-specific differences in stress response and cognitive performance across development.

Main Methods:

  • Rats were exposed to acute stress (tail shocks) and tested on trace eyeblink conditioning.
  • Cognitive performance, corticosterone, estradiol, progesterone, and testosterone levels were measured.
  • Testing occurred at pre-pubertal, pubertal, and adult stages.

Main Results:

  • Stress enhanced conditioning during puberty in both sexes.
  • In adulthood, stress impaired female conditioning but enhanced male conditioning.
  • Stress increased corticosterone in all groups; reproductive hormones showed age- and sex-dependent changes but were unaffected by stress.

Conclusions:

  • Rats exhibit similar responses to stress and learning before and during puberty.
  • Sex differences and opposing stress responses emerge in adulthood.
  • Developmental stage significantly modulates the impact of stress on cognitive function.

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