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THE CONNECTIONS OF THE THIRD AND SECOND BRANCHES OF TRIGEMENAL NERVE WITH NEUCLEUS IN THE CENTRAL NERVOUS SYSTFM
Author(s): 
Pages: 168-175+228
Year: Issue:  2
Journal: Acta Anatomica Sinica

Keyword:  内脏痛实验形态学孤束核溃变纤维形态学基础胶状质细胞承浆神经核团蓝斑核脑干部;
Abstract: The morphological basis of the Inhibition of the visceral traction reflex and visceral pain in subtotal gastrectomy under acupuncture anesthesia by needling the facial points (Ren-zhong,Gheng-jang and New point Ⅱ)was studied by the following experiments. The second or third branches of unilateral trigeminal nerve and their associated ganglion were destroyed by heat in 8 cats,The animals were sacrificed after 7~8 days and their brains and spinal cords were fixed in 10% formalin.Modified Fink and Heimer’s method for degerating nerve fibers was processed on serial frozen sections of 30 μ in thickness. After the injury of the second and third branches of the trigeminal nerve,the degenerating nerve fibers were observed in Lissaur’s tractus and Rolando substance at the third cervical level in the spinal cord and in the nucleus tractus spinalis N.trig- emini,reticuloformation,nucleus tractus solitaris,giganto-cellularis,and nucleus sensor- ius N.trigemini in the brain stem.A few degenerative fibers were observed in Locus coeruleus and nucleus raphas. The above results show that the second and third branches of the trigeminal nerve may have connections with nucleus gigantocellularis,reticuloformation and nucleus tractus solitaris,and these connection may be involved in the inhibition of visceral pain by needling the facial points in acupuncture anesthesia during gastric resection. The presence of degenerating nerve fibers in locus coeruleus and nucleus raphas needs further studies.
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