本研究使用Fink-Heimer法,用成体狗3只、成体猫7只观察了三叉神经一级传入纤维在中枢的分布。实验结果表明,三叉神经一级传入纤维除投入同侧上三个颈髓节段的后角,三叉神经感觉核、弧束核、网状巨细胞核、楔外核、蓝斑核和中缝大核外,也投入同侧小脑蚓部Ⅵ、ⅦA叶和CrⅠ、CrⅡp区。本文着重讨论本实验结果与针刺镇痛的关系问题。 In this study, Fink-Heimer method was used. Three adult dogs and seven adult cats were used to observe the central distribution of primary afferent fibers of trigeminal nerve. The experimental results show that the primary afferent fibers of the trigeminal nerve, in addition to the posterior horn of the three cervical segments on the ipsilateral, the trigeminal sensory nucleus, the arched nucleus, the reticular giant cell nucleus, the wedge outer nucleus, the locus coeruleus, Nuclear, but also put ipsilateral cerebellar vermis Ⅵ, Ⅶ A leaves and Cr Ⅰ, Cr Ⅱ p area. This article focuses on the experimental results and the relationship between acupuncture analgesia.