尾核向大脑皮层和丘脑非特异核群的纤维投射

THE FIBRE PROJECTION OF THE CAUDATE NUCLEUS TO THE CEREBRAL CORTEX AND THE NONSPECIFIC THALAMIC NUCLEUS

本实验破坏家兔尾核头部,用Nauta和Glees法显示轴索和终末溃变,观察尾核向大脑皮层和丘脑非特异核群的纤维投射,所得结果如下:尾核头部的纤维投射到大脑额部皮层(主要是前中央区)和边缘区皮层,并终止于皮层的各层。尾核头部的纤维投射到中央中核和束旁核等丘脑非特异核群。根据上述结果,我们认为尾核向大脑皮层和丘脑非特异核群的纤维投射,乃是非特异传导系统的径路之一;尾核不仅属于锥体外系,也是非特异系统的组成部分;尾核参与电针镇痛过程是有形态学根据的。

The fibre projections of the caudate nucleus to the cerebral cortex and the nonspecific thalamic nucleus in the rabbit were studied by tracing the degenerated axons and terminal fibres from electrolytic lesions in the head portion of the nucleus on sections prepared with Nauta and Glees methods.The results were as follows:The efferent fibres from the head portion of the caudate nucleus were projected to frontal(especially the praecentral areas)and limbic cortex,and terminated in all the layers of the cerebral cortex.The efferent fibres from the head portion of the caudate nucleus were projectet to the centromedian nucleus and parafascicular nucleus of the nonspecific thalamic nuclei.The above observations suggest that the projection of the efferent fibres from the caudate nucleus to the cerebral cortex and nonspecific thalamic nuclei may be a parf of the nonspecific conducting pathway;and the caudate nucleus is not only a part do the extrapyramidal system but a structure of the nonspecific conducting system which may serve as the morphological basis for the role played by the caudate nucleus in the acupunctural analgesia.