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首页> 外文期刊>Archives of Oral Biology >Response properties of periodontal mechanosensitive neurons in the trigeminal ganglion of rabbit and neuronal activities during grinding-like jaw movement induced by cortical stimulation.
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Response properties of periodontal mechanosensitive neurons in the trigeminal ganglion of rabbit and neuronal activities during grinding-like jaw movement induced by cortical stimulation.

机译：兔三叉神经节中牙周机械敏感神经元的响应特性以及皮层刺激诱发的下颚状下颌运动过程中的神经元活动。

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OBJECTIVE: To examine the response properties of incisor- and molar-sensitive periodontal mechanosensitive (PM) neurons in the trigeminal ganglion of rabbit and the activities of the molar-sensitive PM neurons during the grinding-like jaw movement. DESIGN: Discharges of PM units were recorded from the trigeminal ganglion with a microelectrode. The grinding-like jaw movement was induced by repetitive electrical stimulation of the cortical masticatory area. RESULTS: Upper-incisor (UI) and upper-molar (UM) units were recorded from the rostromedial area of the trigeminal ganglion, and lower-incisor (LI) and lower-molar (LM) units were distributed in the caudolateral area. Most PM units were responsive to only one tooth, slowly adapting ones and responded to tooth stimulation of a force of less than 0.05 N. The optimal stimulus direction for most UI units was labio-lingual, axial or linguo-labial, and that for most LI units was linguo-labial or axial. The optimal stimulus direction of anterior UM and LM units was oriented predominantly mesio-distal or axial. The maximum frequency of spike discharges for UM units for which the optimal stimulus direction was axial or bucco-lingual was in the middle period of the grinding phase. However, UM units for which the optimal stimulus direction was mesio-distal or linguo-buccal were fired mostly in the early period. CONCLUSIONS: Periodontal sensory information in the grinding phase of jaw movement is transmitted by PM neurons with various response properties encoding the magnitude and direction of a force at least, in a weaker range of force than a saturating response level.
机译：目的：观察家兔三叉神经节中门牙和磨牙敏感的牙周机械敏感（PM）神经元的反应特性，以及磨牙样下颌运动期间磨牙敏感的PM神经元的活动。设计：用微电极记录三叉神经节中PM单位的放电。反复咀嚼皮质咀嚼区可引起类似颚的运动。结果：从三叉神经节的髓系区域记录了上切牙（UI）和上磨牙（UM）单位，在前外侧区域分布了下切牙（LI）和下磨牙（LM）单位。大多数PM单位仅对一颗牙齿有反应，缓慢适应牙齿并对小于0.05 N的力的牙齿刺激作出反应。大多数UI单位的最佳刺激方向是唇舌，轴向或舌唇，而大多数LI单位为唇阴或轴向。前UM和LM单元的最佳刺激方向主要是近中或轴向。对于UM单元，其最佳刺激方向是轴向或颊舌的尖峰放电的最大频率是在研磨阶段的中期。但是，最佳刺激方向为近中或舌颊的UM单位大多是在早期被解雇的。结论：颚运动磨削阶段的牙周感觉信息是由PM神经元传递的，这些神经元具有各种响应特性，至少在比饱和响应水平更弱的力范围内编码力的大小和方向。

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