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A critical appraisal of electrical stunning in chickens

Published online by Cambridge University Press:  18 September 2007

A.B.M. Raj
A.B.M. Raj
Affiliation:
Department of Clinical Veterinary Science, University of Bristol, Langford, Bristol BS40 5DU, United Kingdom, e-mail: m.raj@bristol.ac.uk
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Abstract

Chickens, unlike red meat species, do not show grand ma1 epilepsy in the brain following electrical stunning. The underpinning causes of this and the brain mechanisms associated with the induction and maintenance of electrical stunning induced unconsciousness in chickens have not been elucidated. However, the changes occurring in the electroencephalogram (EEG), abolition of somatosensory evoked potentials (SEPs), induction of seizure and loss of muscle tone or physical reflexes following electrical stunning have been used in the past to ascertain the effectiveness of waterbath electrical stunning in chickens.

The purpose of this appraisal is to evaluate scientifically the relative merits of some of the criteria that have been used for ascertaining the effectiveness of electrical stunning in chickens. Scientific literature suggests that, unlike red meat species, the electrical stunning-induced release of monoamines and inhibitory amino acid neurotransmitter(s) in the chicken brain may play prominent roles in the induction and maintenance of unconsciousness following electrical stunning. These mechanisms would also appear to be relevant to the manifestation of a profoundly suppressed EEG and abolition of SEPs following electrical stunning, which are suggested to be meaningful indicators of an effective electrical stunning in chickens.

Keywords

poultryelectrical stunningcriteriabrain mechanismneurotransmitters
Type
Reviews
Information
World's Poultry Science Journal , Volume 59 , Issue 1 , March 2003 , pp. 89 - 98
Copyright
Copyright © Cambridge University Press 2003

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References

Bean, G.J., Rhodes, A.E. and Martin, B.A. (1991) Electroconvulsive therapy: electric stimulus variables and the convulsive response. Canadian Journal of Psychiatry 36: 630–636.CrossRefGoogle ScholarPubMed
Callado, L.F. and Stamford, J.A. (2000) Spatiotemporal interaction of alpha2-autoreceptors and noradrenaline transporters in the rat locus coeruleus. Journal of Neurochemistry 74: 2350–2358.CrossRefGoogle Scholar
Cepeda, C. and Levine, M.S. (1998) Dopamine and N-methyl-D-aspartate receptor interactions in the neostriatum. Developmental Neuroscience 20 1–18.CrossRefGoogle ScholarPubMed
Cepeda, C., Buchwald, N.A. and Levine, M.S. (1993) Neuromodulatory actions of dopamine in the neostriatum are dependent upon the excitatory amino acid receptor subtypes activated. Proceedings of the National Academy of Sciences 90: 9576–9580.CrossRefGoogle ScholarPubMed
Cepeda, C., Radisanljevic, Z., Peacock, W., Levine, M.S. and Buchwald, N.A. (1992) Differential modulation by dopamine of responses evoked by excitatory amino acids in human cortex. Synapse 11: 330–341.CrossRefGoogle ScholarPubMed
Chiodo, L.A. and Berger, T.W. (1986) Interactions between dopamine and amino acid-induced excitation and inhibition in the striatum. Brain Research 375: 198–203.CrossRefGoogle ScholarPubMed
Cook, C.J., Devine, C.E., Gilbert, K.V., Smith, D.D. and Maasland, S.A. (1995) The effect of electrical head-only stun duration on electroencephalographic-measured seizures and brain amino acid neurotransmitter release. Meat Science 40: 137–147.CrossRefGoogle ScholarPubMed
Cook, C.J., Devine, C.E., Tavener, A. and Gilbert, K.V. (1992) Contribution of amino acid transmitters to epileptiform activity and reflex suppression in electrically head stunned sheep. Research in Veterinary Science 52: 48–56.CrossRefGoogle ScholarPubMed
De Deurwaerdere, P. and Spampinato, U. (1999) Role of serotonin 2a and serotonin2b/2c receptor subtypes in the control of accumbal and striatal doparnine release elicited in vivo by dorsal raphe neucleus electrical stimulation. Journal of Neurochemistry 73: 1033–1042.CrossRefGoogle Scholar
Dreifuss, F.E. and Ogunyemi, A.O. (1992) Classification of epileptic seizures and the epilepsies: an overview. Epilepsy Research Supplement 6: 3–11.Google ScholarPubMed
Firman, J.D. and Beck, M.M. (1984) GABA in brain tissue of paroxysmal (px) chick. Comparative Biochemistry and Physiology 79C: 143–145.Google Scholar
Godbout, R., Mantz, J., Pirot, S., Glowinski, J. and Thierry, A.M. (1991) Inhibitory influence of the mesocortical dopaminergic neurones on their target cells: electrophysiological and pharmacological characterisation. Journal of Pharmacology and Experimental Therapeutics 258: 728–738.Google Scholar
Gregory, N.G. (1986) The physiology of electrical stunning and slaughter. In: Humane Slaughter of Animals for Food. Universities Federation for Animal Welfare (Publishers) ISBN 0 900767 41 3. pp 3–12.Google Scholar
Gregory, N.G. and Wilkins, L.J. (1989) Effect of stunning current on carcase quality in chickens. The Veterinary Record 124: 530–532.CrossRefGoogle ScholarPubMed
Gregory, N.G. and Wotton, S.B. (1987) Effect of electrical stunning on the electroencephalogram in chickens. British Veterinary Journal 143: 175–183CrossRefGoogle ScholarPubMed
Gregory, N.G. and Wotton, S.B. (1989) Effect of electrical stunning on somatosensory evoked potentials in chickens. British Veterinary Journal 145: 159–164CrossRefGoogle ScholarPubMed
Gregory, N.G. and Wotton, S.B. (1990a) Effect of stunning on spontaneous physical activity and evoked activity in the brain. British Poultry Science 31: 215–220CrossRefGoogle ScholarPubMed
Gregory, N.G. and Wotton, S.B. (1990b) An evaluation of the effectiveness of handheld stunners for stunning chickens. The Veterinary Record 126: 290–291.Google ScholarPubMed
Gregory, N.G. and Wotton, S.B. (1991) Effect of a 350 Hz DC stunning current on evoked responses in the chicken's brain. Research in veterinary Science 50: 250–251CrossRefGoogle ScholarPubMed
Gruss, M. and Braun, K. (1997) Distinct activation of monoaminergic pathways in chick brain in relation to auditory imprinting and stressful situations: a microdialysis study. Neuroscience 76 891–899.CrossRefGoogle ScholarPubMed
Gruss, M., Brendenkotter, M. and Braun, K. (1999) N-methyl-D-aspartate receptor-mediated modulation of monoaminergic metabolites and amino acids in the chick forebrain: an in vivo microdialysis and electrophysiology study. Journal of Neurobiology 40: 116–135.3.0.CO;2-M>CrossRefGoogle Scholar
Hawken, M. (1979) Seizures: etiology, classification, intervention. Journal of Neurosurgical Nursing 11: 166–170.Google ScholarPubMed
Hoenderken, R. (1978) In: Electrical stunning of slaughter pigs. PhD Thesis, University of Utrecht.Google Scholar
Hyrman, V. (1999) Pulse width and frequency in ECT. Journal of ECT 15: 285–287.CrossRefGoogle ScholarPubMed
Hyrman, V., Palmer, L.H., Cernik, J. and Jetelina, J. (1985) ECT: the search for the perfect stimulus. Biol. Psychiatry 20: 634–645.CrossRefGoogle ScholarPubMed
Iversen, S.D. and Iversen, L.I. (1981) In: Behavioural Pharmacology, Oxford University Press, pp 105.Google Scholar
Kawaguchi, Y. and Shindou, T. (1998) Noradrenergic excitation and inhibition of GABAergic cell types in rat frontal cortex. The Journal of Neuroscience 18: 6963–6976.CrossRefGoogle ScholarPubMed
Krystal, A.D. and Weiner, R.D. (1999) EEG correlates of the response to ECT: A possible antidepressant role of brain-derived neurotrophic factor. The Journal of ECT 15: 27–38.CrossRefGoogle ScholarPubMed
Kuenzel, W.J. and Walther, J.H. (1978) Heart rate, blood pressure, respiration, and brain waves of broilers as affected by electrical stunning and bleed-out. Poultry Science 57: 655–659.CrossRefGoogle Scholar
Lambooy, E. (1981) In: Some neural and physiological aspects of electrical and mechanical stunning in ruminants. PhD Thesis, University of Utrecht.Google Scholar
Larson, A.A. and Beitz, A.J. (1988) Glycine potentiates strichnine-induced convulsions: role of NMDA receptors. Journal of Neuroscience 8: 3822–3826.CrossRefGoogle Scholar
Liberson, W.T. (1948) Brief stimulus therapy: Physiological and clinical observations. American Journal of Psychiatry 105: 28–29.CrossRefGoogle Scholar
Meldrum, B. (1984) Amino acid neurotransmitters and new approaches to anticonvulsant drug action. Epilepsia 25 (Supplement): S140–S149CrossRefGoogle ScholarPubMed
Meldrum, B. (1994) The role of glutamate in epilepsy and other CNS disorders. Neurology 44 (Suppl 8): S14–S23.Google ScholarPubMed
Mouchoniere, M., Le Pottier, G. and Fernandez, X. (1999) The effect of current frequency during waterbath stunning on the physical recovery and rate and extent of bleed out in turkeys. Poultry Science 77: 485–489.CrossRefGoogle Scholar
Radisavljevic, Z., Cepeda, C., Peacock, W., Buchwald, N.A. and Levine, M.S. (1994) Norepinephrine modulates excitatory amino acid-induced responses in developing human and adult rat cerebral cortex. International Journal of Developmental Neuroscience 12: 353–341.CrossRefGoogle ScholarPubMed
Raj, A.B.M. and O'Callaghan, M. (2001) Evaluation of a pneumatically operated captive bolt for stunning/killing broiler chickens. British Poultry Science 42: 295–299.CrossRefGoogle ScholarPubMed
Raj, A.B.M., Gregory, N.G. and Wotton, S.B. (1992) Changes in the somatosensory evoked potentials and spontaneous electroencephalogram of hens during stunning with a carbon dioxide and argon mixture, British Veterinary Journal 148: 147–156.CrossRefGoogle Scholar
Richards, S.A. and Sykes, A.H. (1967) Physiological effects of electrical stunning and venesection in the fowl. Research in Veterinary Science 8: 361–368.CrossRefGoogle ScholarPubMed
Robin, A. and De Tissera, S. (1982) A double-blind controlled comparison of the therapeutic effect of low and high energy electroconvulsive therapies. British Journal of Psychiatry 141: 357–366.CrossRefGoogle Scholar
Rhody, J.L. and Kuenzel, W.J. (1981) Electroencephalograms, electrocardiograms, and blood pressure of seizure-prone chicks (Gallus domesticus). Physiology and Behaviour 26: 1007–1011.CrossRefGoogle ScholarPubMed
Rolls, E.T., Thorpe, S.J., Boytim, M., Szabo, I. and Perrett, D.I. (1984) Responses of striatal neurones in the behaving monkey. 3. Effects of inophorotically applied dopamine on normal responsiveness. Neuroscience 12: 1201–1212.CrossRefGoogle ScholarPubMed
Rossetti, Z.L., Marcangione, C. and Wise, R.A. (1998) Increase of extracellular glutamate and expression of Fos-like immunoreactivity in the ventral tegmental area in response to electrical stimulation of the prefrontal cortex. Journal of Neurochrmistry 70: 1503–1512.CrossRefGoogle ScholarPubMed
Sackeim, H.A., Long, J., Luber, B., Moeller, J.R., Prohovnik, I., Devanand, D.P. and Nobler, M.S. (1994) Physical properties and quantification of the ECT stimulus: 1. Basic principles. Convulsive Therapy 10: 93–123.Google Scholar
Schutt-Abraham, I., Wormuth, H.-J., Fessel, J. and Knapp, J. (1983) In: Stunning of Animals for Slaughter, ed. Eikelenboom, G., p. 154. The Hague: Martinus Nijhoff.Google Scholar
Siuciak, J.A., Gamache, P.H. and Dubocovich, M.L. (1992) Monoamines and their precursors and metabolites in the chicken brain, pineal, and retina: regional distribution and day/hight variations. Journal of Neurochemistry 58: 722–729.CrossRefGoogle Scholar
Wambebe, C. and Osuide, G. (1984) Influence of dopamine, levodopa and apomorphine on maximal electroconvulsive seizure in the domestic fowl (gallus domesticus). Japanese Journal of Pharmacology 35: 339–346.CrossRefGoogle ScholarPubMed
Wilkins, L.J., Gregory, N.G., Wotton, S.B. and Parkman, I.D. (1998) Effectiveness of electrical stunning applied using a variety of waveform-frequency combinations and consequences for carcass quality in broilers. British Poultry Science 39: 511–518.CrossRefGoogle Scholar
Woolly, S.A., Brothwick, F.J.W. and Gentle, M.J. (1986a) Flow routes of electric currents in domestic hens during pre-slaughter stunning. British Poultry Science 27: 403–408.CrossRefGoogle Scholar
Woolly, S.A., Brothwick, F.J.W. and Gentle, M.J. (1986b) Tissue resistivities and current pathways and their importance in pre-slaughter stunning of chickens. British Poultry Science 27: 301–306.CrossRefGoogle Scholar
Wotton, S.B. and Wilkins, L.J. (1999) Effect of very low pulsed direct currents at high frequency on the return of neck tension in broilers. The Veterinary Record 145: 393–396.CrossRefGoogle ScholarPubMed
You, Z.-B., Tzschentke, T.M., Brodin, E. and Wise, R.A. (1998) Electrical stimulation of the prefrontal cortex increases cholecystokinin, glutamate and dopamine release in the nucleus accumbens: an in vivo microdialysis study in freely moving rats. The Journal of Neuroscience 18: 6492–6500.CrossRefGoogle Scholar