Physiological properties of molar-mechanosensitive periodontal neurons in the trigeminal ganglion of the rat

Archives of Oral Biology
T TabataHaruhide Hayashi

Abstract

Spike discharges from periodontal mechanosensitive neurones responding to the mechanical stimulation of molar teeth were recorded from the trigeminal ganglion of rats anaesthetized with pentobarbital sodium. Maxillary molar-sensitive units were close together in a narrow, lateral area of the maxillary division of the ganglion, whereas those of mandibular molar-sensitive units were scattered throughout the mandibular division. The majority of maxillary molar-sensitive units responded only to stimulation of the first molar. They were slowly adapting and responded most strongly to pressure applied to the lingual surface and buccal cusp of the tooth or to the buccal surface and lingual cusp. By contrast, approximately one-half of the mandibular molar-sensitive units were rapidly adapting, multitooth units that responded to tooth stimulation almost equally in all directions. The other half were slowly adapting and activated most effectively by pressure applied to the lingual surface and buccal cusp of the molar tooth. These slowly adapting units consisted of first molar-sensitive, single- and multitooth units. Differences in the response characteristics of the maxillary and mandibular molar-sensitive periodontal units may reflect di...Continue Reading

References

Jan 1, 1975·Journal of Morphology·W A Weijs
Apr 1, 1973·Archives of Oral Biology·J M Gregg, A D Dixon
Jul 1, 1969·Archives of Oral Biology·A G Hannam
Oct 1, 1970·Archives of Oral Biology·A G Hannam
Aug 1, 1962·The Journal of Physiology·P O BISHOPR DAVIS

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