大白鼠丘脑束旁核的传入纤维联系——HRP法研究

THE AFFERENT CONNECTIONS OF THE PARAFASCICULAR NUCLEUS OF THE ALBINO RAT——A RETROGRADE HRP STUDY

用HRP逆行传递法,研究了大白鼠丘脑束旁核的传入纤维联系。发现以下核团有细胞发出纤维投射到束旁核:脑干网状结构(以楔状核、脑桥首侧网状核和延髓网状巨细胞核为主)、中脑中央灰质、中缝核群(主要是中缝背核和中缝大核)、某些感觉中继核(主要是三叉神经脊束尾侧核)、小脑齿状核、黑质网状部、间脑某些核团(主要是未定带和下丘脑腹内侧核)以及大脑皮质(以6区为主)。根据束旁核的传入纤维联系和有关报道,对束旁核的部分功能,特别是在痛觉中的作用进行了分析。

The afferent connections of the parafascicular nucleus of the thalamus werestudied in 36 albino rats by the method of the retrograde axonal transport of HRP.The nuclear groups that project into the parafascicular nucleus are demonstratedas follows:1.The reticular formation of the brain stem,including nucleus cuneifor-mis,nucleus reticularis pontis oralis and nucleus reticularis gigantocellularis,etc.;2.the griseum centrale mesencephali;3.The nuclei raphe,mainly nucleus raphe dorsalisand nucleus raphe magnus;4.The labeled cells were consistently found in some ofthe sensory nuclei,especially in nucleus trigemini caudalis;5.The nucleus of locuscoeruleus and subcoeruleus;6.The dentate nucleus of the cerebellum;7.The reticu-lar part of the substantia nigra;8.Nucleus ruber;9.Some of the diencephalicnuclei,chiefly The zone incerta and nucleus ventromedialis of the hypothalamus and10.The cerebral cortex.