Relationship between ethanol preference and sensation/novelty seeking

Lidia Manzo, Maa José Gómez, José E. Callejas-Aguilera, Rocío Donaire, Marta Sabariego, Alberto Fernández-Teruel, Antoni Cañete, Gloria Blázquez, Mauricio R. Papini, Carmen Torres

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)

Abstract

High- and low-avoidance Roman inbred rat strains (RHA-I, RLA-I) were selected for extreme differences in two-way active avoidance. RHA-I rats also express less anxiety than RLA-I rats. This study compared male Roman rats in ethanol preference and sensation/novelty seeking. Rats were first exposed in counterbalanced order to the hole-board test (forced exposure to novelty) and the Y-maze and emergence tests (free choice between novel and familiar locations). Then, rats were tested in 24-h, two-bottle preference tests with water in one bottle and ethanol (2, 4, 6, 8, or 10% in successive days). Compared to RLA-I rats, RHA-I rats showed (1) higher frequency and time in head dipping, (2) higher activity, and (3) lower frequency of rearing and grooming in the hole-board test, and (4) remained in the novel arm longer in the Y-maze test. No strain differences were observed in the emergence test. RHA-I rats exhibited higher preference for and consumed more ethanol than RLA-I rats at all concentrations. However, both strains preferred ethanol over water for 2-4% concentrations, but water over ethanol for 6-10% concentrations. Factorial analysis with all the rats pooled identified a two-factor solution, one grouping preferred ethanol concentrations (2-4%) with head dipping and grooming in the hole board, and another factor grouping the nonpreferred ethanol concentrations (6-10%) with activity in the hole board and novel-arm time in the Y-maze test. These results show that preference for ethanol is associated with different aspects of behavior measured in sensation/novelty-seeking tests. © 2014 Elsevier Inc.
Original languageEnglish
Pages (from-to)53-60
JournalPhysiology and Behavior
Volume133
DOIs
Publication statusPublished - 22 Jun 2014

Keywords

  • Ethanol preference
  • Novelty seeking
  • Roman high- and low-avoidance strains
  • Sensation seeking

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