Effect of diazepam on the runway method using priming stimulation of intracranial self stimulation behavior

Hidenori Sagara, Yoshihisa Kitamura, Toshiaki Sendo, Hiroaki Araki, Yutaka Gomita

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Intracranial self-stimulation (ICSS) behavior is an experimental methodology to study reward and motivational effects. We have established a paradigm to evaluate enhancing motivation by drugs in the runway method using the priming stimulation of ICSS. In the present study, we investigated the effects of diazepam on the experimental extinction process of non-reinforcing reward and pre-trial electric priming stimulations in lateral hypothalamic self-stimulation. The extinction process in the runway method consisted of these 15 trials. Diazepam, an anti-anxiety drug, at doses of 0.5 and 1 mg/kg (i.p.) delayed the extinction of running behavior when priming stimulation was given. The GABAergic antagonist flumazenil at doses of 5 and 10 mg/kg (i.p.) totally prevented the effect of diazepam. These results demonstrate that diazepam delays the extinction of running behavior on ICSS in the runway method and flumazenil, a GABAergic antagonist, eliminates the delayed effect of diazepam, that is, indicating that the delayed extinction effect of diazepam may be related to facillitation of motivation, which was promoted via the GABAergic system in the ICSS behavior.

Original languageEnglish
Pages (from-to)355-360
Number of pages6
JournalJournal of Pharmacological Sciences
Volume107
Issue number3
DOIs
Publication statusPublished - 2008

Keywords

  • Diazepam
  • Intracranial self-stimulation
  • Motivational effect

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology

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