Physiological properties of periodontal mechanosensitive neurones in the posteromedial ventral nucleus of rat thalamus
| Autor: | Haruhide Hayashi, Y. Takahashi, Takayoshi Tabata, A Yamaki |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Periodontal Ligament
Thalamus Stimulation Stimulus (physiology) Biology stomatognathic system Reaction Time medicine Animals Periodontal fiber General Dentistry Ventral Thalamic Nuclei Cell Biology General Medicine Anatomy Adaptation Physiological Electric Stimulation Rats Peripheral Incisor stomatognathic diseases medicine.anatomical_structure nervous system Otorhinolaryngology Receptive field Mechanosensitive channels Stress Mechanical Mechanoreceptors Nucleus |
| Zdroj: | Archives of Oral Biology. 47:689-694 |
| ISSN: | 0003-9969 |
| DOI: | 10.1016/s0003-9969(02)00030-4 |
| Popis: | Unitary discharges of periodontal mechanosensitive (PM) neurones responding to mechanical tooth stimulation were recorded from the posteromedial ventral nucleus (VPM) of rat thalamus. PM neurones are distributed in the ventromedial area in the rostral two-thirds of the VPM nucleus. Maxillary and mandibular tooth-sensitive neurones are arranged in dorsoventral sequence. Of the PM neurones, 36% were slowly adapting to pressure applied to the tooth and 67% were rapidly adapting. The majority of PM units were sensitive to the contralateral incisor tooth. Response magnitudes of the slowly adapting neurones varied with stimulus direction and were directionally selective to mechanical tooth stimulation. The optimal stimulus direction was labiolingual or linguolabial. Rapidly adapting neurones were directionally non-selective to tooth stimulation. The threshold for mechanical stimulation was |
| Databáze: | OpenAIRE |
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