颜面部针刺镇痛效应传入途径的实验形态学研究 (二)三叉神经尾侧脊束核的纤维投射

<正> 祖国医学实践证明,头面部刺镇痛和针刺治病效果显著;近年来开展的头面部针剌麻醉也取得了较为满意的效果。神经解剖学记载,颜面部痛、温觉是经三叉神经传入到同侧三叉神经脊束核的。电生理学研究表明:在此核的尾段可记录到“痛”细胞放电.可见,三叉神经和三叉神经尾侧脊束核

AN EXPERIMENTAL MORPHOLOGICAL STUDY OF THE AFFERENT PATHWAY REGARDING THE EFFECT OF THE FACIAL ACUPUNCTURE ANALGESIA Ⅱ、FIBER PROJECTIONS FROM THE SPINAL CAUDAL TRIGEMINAL NUCLEUS IN RABBIT

After making a partial lesion on the spinal caudal trigeminal nucleus of the rabbit with the stereotaxic apparatus, the sections of the brain stem and the spinal cord were stained by the Nauta-Gygax and Fink-Heimer techiques. The efferent fiber projections of this nucleus in the central nervous system were observed.The results were as follows. 1. The spinal caudal trigeminal nucleus gives rise to the ascending fibers projecting bilaterally into ventral posteromedial nucleus and parafasiculocentro-median complex of the thalamus, and a few of the ascending fibers project to the medial regions of the medial geniculate body bilaterally, but predominantly in the contralateral side. 2. A large number of fibers from this trigeminal nucleus project onto bilateral dorsal and ventral reticular nuclei and gigantocellular reticular nuclei, and also to the ipsilateral parvocellular and lateral reticular nuclei. 3. Some fibers coming from this trigeminal nucleus project to some other nuclei, such as the ipsilateral spinal oral and principal nuclei of the trigeminl nerve, the spinal vestibular nucleus, the bilateral vestibular nuclei and solitary tract nuclei, and to the ipsilateral motor trigeminal nucleus, the oculomotor nucleus, the bilateral dorsal vagal nuclei, the hypoglossal nuclei and the facial nuclei. 4. The fibers from this trigeminal nucleus also project to the bilateral cuneatus nuclei, cuneatus lateral and medial accessory olivary nuclei, the tectum of the midbrain,and the magnocellular raphe nucleus,and enter periaqueductal gray matter, the ipsilateral locus coeruleus and vermis of the cerebellum, etc. 5. The fibers from the spinal caudal trigeminal nucleus descend to end in the ipsilateral nucleus proprius cornu dorsalis, the substantia gelatinosa Rolandi and the bilateral anterior horn of the sginal cord (c_1-c_3) 6. The functions of these fiber connections in the facial acupuncture analgesia and anaesthesia were discussed.