Validation of behavioural indicators used to assess unconsciousness in sheep
| Autor: | L.J. Hellebrekers, Marien Gerritzen, Bas Kemp, M. Kluivers-Poodt, M.T.W. Verhoeven |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Unconsciousness
halothane-anesthetized calves Electroencephalography anesthesia consciousness spectral edge frequency Wageningen Bioveterinary Research Dierenwelzijn en gezondheid electroencephalographic responses Reflex medicine bispectral index Animals Animal Health & Welfare Adaptatiefysiologie Propofol ventral-neck incision Sheep General Veterinary medicine.diagnostic_test business.industry broiler-chickens Respiration Eyelids pigs medicine.anatomical_structure Bispectral index Anesthesia Breathing WIAS Adaptation Physiology Eyelid slaughter Spectral edge frequency medicine.symptom business Abattoirs medicine.drug |
| Zdroj: | Research in Veterinary Science, 101, 144-153 Research in Veterinary Science 101 (2015) |
| ISSN: | 0034-5288 |
| Popis: | The validity of behavioural indicators to assess unconsciousness under different slaughter conditions is under (inter)national debate. The aim of this study was to validate eyelid-, withdrawal-, threat reflex and rhythmic breathing as indicators to assess unconsciousness in sheep. Sheep were monitored during repeated propofol anaesthesia (n = 12) and during non-stunned slaughter (n = 22). Changes in the EEG and behavioural indices of consciousness/unconsciousness were assessed and compared in sheep. Threat reflex and rhythmic breathing correlated with EEG activity during propofol anaesthesia whilst absence of non-rhythmic breathing or threat reflex indicated unconsciousness. None of the behavioural indicators correlated with EEG activity during non-stunned slaughter. Absence of regular breathing and eyelid reflex was observed 00:27 ± 00:12 min and 00:59 ± 00:17 min (mean ± SD) respectively after animals were considered unconscious, indicating that absence of regular breathing and eyelid reflex are distinctly conservative indicators of unconsciousness during non-stunned slaughter in sheep. |
| Databáze: | OpenAIRE |
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