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Related Experiment Videos

Amphetamine-induced hyperactivity: differences between rats with high or low preference for alcohol

C Fahlke1, E Hård, C J Eriksson

  • 1Department of Psychology, Göteborg University, Sweden.

Alcohol (Fayetteville, N.Y.)
|July 1, 1995
PubMed
Summary
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High-ethanol preferring rats show greater amphetamine-induced activity and corticosterone response, suggesting a shared neural basis for alcohol consumption and stimulant drug effects.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Behavioral Science

Background:

  • Individual differences in ethanol consumption exist.
  • The mesocorticolimbic dopamine system is implicated in reward and motivation.

Purpose of the Study:

  • To investigate the relationship between ethanol intake and locomotor activity.
  • To examine the effects of amphetamine on locomotor activity in rats with differing ethanol preferences.
  • To assess plasma corticosterone levels in response to locomotor activity tests.

Main Methods:

  • Wistar rats were categorized into high-preferring (HP) and low-preferring (LP) groups based on ethanol intake.
  • Locomotor activity was measured spontaneously and after d-amphetamine sulfate injection.
  • Plasma corticosterone levels were determined post-testing.

Related Experiment Videos

Main Results:

  • No differences in spontaneous locomotor activity or baseline corticosterone.
  • Amphetamine significantly increased locomotion more in HP rats than LP rats.
  • Corticosterone levels increased after amphetamine, with a larger increase observed in HP rats.

Conclusions:

  • Ethanol intake and amphetamine responsiveness may share common neural substrates.
  • Individual differences in these neural substrates could explain the correlation between alcohol drinking and stimulant response.
  • Ethanol consumption may sensitize neural pathways involved in amphetamine-induced hyperactivity.