电刺激中央中核诱发猫丘脑后核群单位放电的观察

Study on Unit Discharges of the Posterior Group of Thalamic Nuclei Evoked by Electric Stimulation of Centromedian Nucleus in Cat

本文用细胞外微电极记录方法和脑立体定位技术．观察了电刺激中央中核在猫丘脑后核群诱发的单位放电，共16例，并与内脏大神经传入冲动诱发的猫丘脑后核群单位放电（共63例）进行了对比。发现中央中核诱发单位放电与内脏大神经诱发单位放电在同一丘脑后核群神经元单位有会聚。提示中央中核与丘脑后核群间存在某种直接或间接的纤维及机能联系，新脊丘束痛觉传导路与旧脊丘束痛觉传导路有密切关系。

The unit discharges of posterior group of thalamic nuclei (PO), evoked by stimulating greater splanchnic nerve (SPL)and centromedian nucleus(CM) respectively in cats were studied with extracellular recording method and stereotaxic techniques. The evoked potentials of 63 neurons in PO by stimulating SPL and 16 ones in PO by stimulating CMwere observed in 26 cats, indicating that PO might be one of the representative areas of the splanchnic afferent pathway and there might be a nervous projection between CM and PO. Moreover, convergence of unit discharges produced by stimulating CM and SPL in PO was found, suggesting that pain signals from the viscera and impulses from CM can interact each other at PO.