Features of compulsive checking behavior mediated by nucleus accumbens and orbital frontal cortex

Anna Dvorkin, Charmaine Silva, Thomas McMurran, Liane Bisnaire, Jane Foster, Henry Szechtman

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The quinpirole sensitization model of obsessive-compulsive disorder was used to investigate the functional role that brain regions implicated in a neuroanatomical circuit of obsessive-compulsive disorder may play in compulsive checking behavior. Following repeated injections of saline or quinpirole (0.5 mg/kg, twice per week, ×8 injections) to induce compulsive checking, rats received N-methyl-d-aspartate lesions of the nucleus accumbens core (NAc), orbital frontal cortex (OFC) and basolateral amygdala, or sham lesions. When retested at 17 days post-surgery, the results showed effects of NAc and OFC but not basolateral amygdala lesion. NAc lesions affected measures indicative of the amount of checking behavior, whereas OFC lesions affected indices of staying away from checking. The pattern of results suggested that the functional roles of the NAc and OFC in checking behavior are to control the vigor of motor performance and focus on goal-directed activity, respectively. Furthermore, similarities in behavior between quinpirole sham rats and saline NAc lesion rats suggested that quinpirole may drive the vigor of checking by inhibition of NAc neurons, and that the NAc may be a site for the negative feedback control of checking.

Original languageEnglish (US)
Pages (from-to)1552-1563
Number of pages12
JournalEuropean Journal of Neuroscience
Volume32
Issue number9
DOIs
StatePublished - Nov 2010
Externally publishedYes

Keywords

  • Animal model
  • D2/D3 dopamine agonist
  • Obsessive-compulsive disorder
  • Quinpirole
  • Rat
  • Security motivation

ASJC Scopus subject areas

  • Neuroscience(all)

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