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2004•Journal of Animal and Feed SciencesOpen access

A new method for recording mastication during eating and ruminating in sheep

P. Nørgaard, K. Hilden

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Abstract

A new method for recording jaw movements (JM) oscillations (JMO) in sheep is described.The principle used to record JMO is the changing position of the magnetic fi eld from a magnet relative to a small Hall sensor, when both were positioned in a soft tube surrounding the mouth.The signal was sampled at 20 Hz by a logger hanged in a wheel joint allowing the sheep to move around freely in a small pen.The individual JM were identifi ed and clustered into cycles.Recorded JMO, JM and cycles are presented from an ewe eating and ruminating grass silage.

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What this paper is about

A new method for recording jaw movements (JM) oscillations (JMO) in sheep is described.The principle used to record JMO is the changing position of the magnetic fi eld from a magnet relative to a small Hall sensor, when both were positioned in a soft tube surrounding the mouth.The signal was sampled at 20 Hz by a logger hanged in a wheel joint allowing the sheep to move around freely in a small pen.The individual JM were identifi ed and clustered into cycles.Recorded JMO, JM and cycles are presented from an ewe eating and ruminating grass silage.

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Available abstract

A new method for recording jaw movements (JM) oscillations (JMO) in sheep is described.The principle used to record JMO is the changing position of the magnetic fi eld from a magnet relative to a small Hall sensor, when both were positioned in a soft tube surrounding the mouth.The signal was sampled at 20 Hz by a logger hanged in a wheel joint allowing the sheep to move around freely in a small pen.The individual JM were identifi ed and clustered into cycles.Recorded JMO, JM and cycles are presented from an ewe eating and ruminating grass silage.

Key concepts: Ruminating, Mastication, Rumination, Dentistry, Medicine, Biology, Neuroscience, Cognition

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