D2-agonist quinpirole induces perseveration of routes and hyperactivity but no perseveration of movements

David Eilam, Ilan Golani, Henry Szechtman

Research output: Contribution to journalArticlepeer-review

Abstract

The behavior in an open field of rats injected with the D2-agonist quinpirole (2 mg/kg; n = 10) and saline (n = 10) was analyzed in terms of routes and movements. Quinpirole induces perserveration of routes without inducing perseveration of movements. Perseveration of routes consists of repeated travel along a few paths in a limited portion of the environment. Lack of perseveration of movements was evidenced by the same distribution of lateral, vertical, and forward movements as in saline-treated animals. Quinpirole also increased the total amount of progression and the total number of movements performed by the rat's body parts along all dimensions of movements. Thus, under quinpirole, animals were hyperactive, stereotyped in route, but free in movement. This profile resembles behavior under low doses of amphetamine but not the behavior under either apomorphine or high doses of amphetamine. Thus, contrary to the current view, administration of a D2-receptor agonist is sufficient to produce a major component of dopamine-induced stereotyped behavior. It is suggested that quinpirole induces perseveration of route by affecting presynaptic release of dopamine, and that the organization of route is independent of the organization of movement.

Original languageEnglish
Pages (from-to)255-267
Number of pages13
JournalBrain Research
Volume490
Issue number2
DOIs
StatePublished - 26 Jun 1989

Keywords

  • Dopamine
  • Movement organization
  • Open field behavior
  • Quinpirole
  • Receptor, D

Fingerprint

Dive into the research topics of 'D2-agonist quinpirole induces perseveration of routes and hyperactivity but no perseveration of movements'. Together they form a unique fingerprint.

Cite this