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Sleep in dairy cows recorded with a non-invasive EEG technique

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dc.contributor University of Helsinki, Faculty of Veterinary Medicine en
dc.contributor University of Helsinki, Department of Agricultural Sciences en
dc.contributor.author Ternman, Emma
dc.contributor.author Hänninen, Laura
dc.contributor.author Pastell, Matti
dc.contributor.author Agenäs, Sigrid
dc.contributor.author Peetz Nielsen, Per
dc.date.accessioned 2012-08-20T11:40:01Z
dc.date.available 2012-08-20T11:40:01Z
dc.date.issued 2012
dc.identifier.citation Ternman , E , Hänninen , L , Pastell , M , Agenäs , S & Peetz Nielsen , P 2012 , ' Sleep in dairy cows recorded with a non-invasive EEG technique ' Applied Animal Behaviour Science , vol 140 , no. 1-2 , pp. 25-32 . , 10.1016/j.applanim.2012.05.005 en
dc.identifier.issn 0168-1591
dc.identifier.other PURE: 21467828
dc.identifier.uri http://hdl.handle.net/10138/36026
dc.description.abstract Sufficient sleep time is important for both an adequate metabolic system and the immune function. Sleep in animals is often estimated by behavioural observations, or recorded on restrained animals with invasive electroencephalogram (EEG) techniques, which might affect sleep patterns. Earlier studies on sleep in cows showed that they sleep about 4 h per day and drowse almost twice the time. The aim of this study was to record and differentiate between vigilance states in dairy cows using a non-invasive EEG method. Brain activity (electroencephalography, EEG), eye movements (electrooculography, EOG) and muscle activity (electromyography, EMG) were recorded for 6 h per animal using surface-attached electrodes to measure different vigilance states. Behaviour registrations from direct observations were combined with the EEG data in order to confirm the identification of different vigilance states from the EEG, EOG and EMG recordings. 8 dry dairy cows, lactation number 1–8 and age 3–11 years, of the Swedish Red breed from the research herd at Kungsängen Research Centre, Uppsala, Sweden, were used in the study. The EEG recordings showed that non-rapid eye movement (NREM) sleep displayed low frequency waves, sometimes with slow wave activity. Rapid eye movement (REM) sleep and alert wakefulness shared similar features of desynchronised waves with varying frequency and could be differentiated by reduced neck muscle activity during REM sleep. The main conclusion from this study is that it is possible to distinguish different vigilance states in dairy cows using surface-attached EEG electrodes. en
dc.language.iso eng
dc.publisher ELSEVIER BV
dc.relation.ispartof Applied Animal Behaviour Science
dc.subject 413 Veterinary science en
dc.subject dairy cows en
dc.subject sleep stages en
dc.subject drowsing en
dc.subject NREM-sleep en
dc.subject REM-SLEEP en
dc.subject EEG en
dc.subject NREM-sleep en
dc.subject REM-SLEEP en
dc.subject drowsing en
dc.subject rumination en
dc.title Sleep in dairy cows recorded with a non-invasive EEG technique en
dc.type A1 Refereed journal article
dc.description.version Non Peer reviewed
dc.identifier.doi http://dx.doi.org/10.1016/j.applanim.2012.05.005
dc.type.dcmitype textfile
dc.type.uri info:eu-repo/semantics/article
dc.type.uri http://purl.org/eprint/status/NonPeerReviewed
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