延髓腹侧网状亚核内的三叉神经伤害性神经元。II. 上行投射。
Trigeminal nociceptive neurons in the subnucleus reticularis ventralis. II. Ascending projection.
作者信息
Yokota T, Koyama N, Nishikawa Y, Hasegawa A
机构信息
Department of Physiology, Medical College of Shiga, Otsu, Japan.
出版信息
Neurosci Res. 1991 Jun;11(1):18-27. doi: 10.1016/0168-0102(91)90063-5.
Ascending projection of trigeminal nociceptive neurons in the subnucleus reticularis ventralis (SRV) was studied in urethane/chloralose-anesthetized cats. Thalamic neurons having complex trigeminal receptive fields similar to those of SRV neurons were found in the intralaminar nuclei, i.e. nuclei centralis lateralis, centralis medialis and parafascicularis. About half of the SRV units tested were antidromically activated by electrical stimulation of the nucleus centralis lateralis. It was also found that a significant proportion of SRV units was antidromically activated by electrical stimulation of the mesencephalic reticular formation (MRF), and retrogradely labelled neurons were found in the SRV after HRP injection into the MRF. These findings suggest that SRV neurons relay trigeminal nociceptive inputs directly or indirectly via the MRF to the intralaminar nuclei.
在氨基甲酸乙酯/水合氯醛麻醉的猫中，研究了三叉神经伤害性神经元在腹侧网状核亚核（SRV）中的上行投射。在板内核，即外侧中央核、内侧中央核和束旁核中发现了具有与SRV神经元相似的复杂三叉神经感受野的丘脑神经元。约一半接受测试的SRV单位可被外侧中央核的电刺激逆向激活。还发现，相当一部分SRV单位可被中脑网状结构（MRF）的电刺激逆向激活，并且在将HRP注入MRF后，在SRV中发现了逆行标记的神经元。这些发现表明，SRV神经元通过MRF直接或间接地将三叉神经伤害性输入传递至板内核。
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