PHYSIOLOGICAL-PROPERTIES OF NEURONS IN DIFFERENT PARTS OF THE CAT TRIGEMINAL SENSORY COMPLEX
PHYSIOLOGICAL-PROPERTIES OF NEURONS IN DIFFERENT PARTS OF THE CAT TRIGEMINAL SENSORY COMPLEX
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DOI：
10.1016/0006-8993(82)90137-8
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发表时间：
1982-01-01
期刊：
影响因子：
2.9
通讯作者：
ALBEFESSARD, D
中科院分区：
文献类型：
--
作者：
AZERAD, J;WODA, A;ALBEFESSARD, D
对猫三叉神经感觉复合体的4个亚区进行了系统研究。口亚核接受来自口腔的大量代表，该区域也出现在三叉神经感觉复合体的其他3个分区中。主核细胞向对侧和同侧丘脑腹后部大量投射。同侧投射仅来自口腔代表。伤害性机械刺激的反应单位位于两个不同的部位：三叉神经尾侧亚核和口腔亚核。牙髓投射到三叉神经感觉复合体的4个区，但投射最重的部位在吻部(主核和口亚核)。牙髓刺激可引起三种不同类型的突触后反应：短潜伏期、一致且突触安全；潜伏期变化强烈、不稳定且容易疲劳；以及一类通过刺激强度和重复的渐进性增强表现出进行性增强。
A systematic investigation of the 4 divisions of the cat trigeminal sensory complex was carried out. The subnucleus oralis receives a large representation from the oral cavity, a region also represented in the 3 other divisions of the trigeminal sensory complex. Nucleus principalis cells project heavily to the contralateral and to the ipsilateral ventroposterior thalamus. Ipsilateral projections are only from the oral cavity representation. Units responding to noxious mechanical stimulation were found at 2 different loci: the subnucleus caudalis for the entire trigeminal area, and subnucleus oralis for the oral cavity alone. The dental pulp projects to the 4 divisions of the trigerminal sensory complex, but the heaviest projection was found in the rostral part (nucleus principalis and subnucleus oralis). Three distinct types of post-synaptic responses were evoked by dental pulp stimulation: short latency, consistent and synaptically secure; strongly variable latency, inconstant and easily fatigued; and a class showing progressive enhancement by progressive increase in stimulus intensity and repetition.