Motivational effect of nomifensine in the intracranial self-stimulation behavior using a runway method

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Intracranial self-stimulation (ICSS) behavior is an experimental methodology to study reward and motivational effects. We have established a new 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 nomifensine on the experimental extinction process of non-reinforcing reward and pre-trial electric priming stimulations in lateral hypothalamic self-stimulation. In this study, the experimental extinction process of the non-reinforcing reward means the experimental method of excluding reward effect in ICSS behavior. The extinction process in the runway method consisted of these 15 trials. Nomifensine, an antidepressant drug, delayed the running speed of the extinction process at doses of 5 and 10 mg/kg (i.p.) compared with the vehicle alone. This result suggests that the delay in the running speed of the extinction process promotes a motivational effect in rats. Previously, priming stimulation in the runway method was found to affect motivational function of ICSS. Therefore, our findings suggest the possible application of nomifensine for improving motivation.

Original languageEnglish
Pages (from-to)1036-1040
Number of pages5
JournalBiological and Pharmaceutical Bulletin
Volume31
Issue number5
DOIs
Publication statusPublished - May 2008

Keywords

  • Intracranial self-stimulation
  • Motivation
  • Nomifensine
  • Priming stimulation
  • Runway

ASJC Scopus subject areas

  • Pharmacology
  • Pharmaceutical Science

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