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Learning & Behavior

, Volume 46, Issue 4, pp 554–560 | Cite as

Rapid eye movement density during REM sleep in dogs (Canis familiaris)

  • Enikő KovácsEmail author
  • András Kosztolányi
  • Anna Kis
Article

Abstract

Dogs (Canis familiaris) are excellent models of human behavior as during domestication they have adapted to the same environment as humans. There have been many comparative studies on dog behavior; however, several easily measurable and analyzable psychophysiological variables that are widely used in humans are still largely unexplored in dogs. One such measure is rapid eye movement density (REMD) during REM sleep. The aim of this study was to test the viability of measuring REMD in dogs and to explore the relationship between the REMD and different variables (sex, age, body size, and REM sleep duration). Fifty family dogs of different breeds and ages (from 6 months to 15 years old) participated in a 3-h non-invasive polysomnography recording, and the data for 31 of them could be analyzed. The signal of the electro-oculogram (EOG) was used to detect the rapid eye movements during REM sleep, and REMD was calculated based on these data. The duration of REM sleep had a quadratic effect on REMD. Subjects’ REMD increased with age, but only in male dogs with short REM sleep duration. Furthermore, in the case of dogs with short REM sleep, the interaction of body mass and REM sleep duration had a significant effect on REMD. No such effects were found in dogs with long REM duration. These results suggest that relationships may exist between REMD and several different variables.

Keywords

Rapid eye movement density REMD REM sleep Dogs 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare no conflicts of interest.

Supplementary material

13420_2018_355_MOESM1_ESM.doc (291 kb)
ESM 1 (DOC 291 kb)

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Copyright information

© Psychonomic Society, Inc. 2018

Authors and Affiliations

  • Enikő Kovács
    • 1
    • 2
    Email author
  • András Kosztolányi
    • 1
  • Anna Kis
    • 2
  1. 1.Department of EcologyUniversity of Veterinary Medicine BudapestBudapestHungary
  2. 2.Institute of Cognitive Neuroscience and PsychologyHungarian Academy of SciencesBudapestHungary

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