后根传入纤维向中枢的投射

国内外曾有过一些报导。但重点多是讨论后根纤维在脊髓灰质内和在延髓各核团的分布以及身体不同部位在延髓薄束核

楔束核内的投射区而对于后根纤维在脊髓灰质内投射的节段性则报导的不多。我们的实验是通过切断颈6～8、胸1(C_(6～8)、T_1)的后根

用溃变染色法

进一步了解C_(6～8)、T_1的后根纤维向中枢投射的节段性及其分布。在针灸临床方面

针刺四肢和面部的一In this study 4 cats were used. The dorsal roots of cervical 6(c6)-tho- racic 1(T1) were cut separately. The degenerated fibers were stained wii- tanen T. Janet method. we have observed the degenerated fibers projecte- d in spinal and medulla. The results were as follows: 1. The degenerated fibers project to the bilateral spinal cord within the down and up 1-2 segments of the operated level. The ipsilateral sides a- re in the majority. The fibers may project toⅤ-Ⅶ lamina of the contrala- teral spinal cord. 2. The dorsal roots fibers of C6-T1 project to Clark's dorsal nuclei. 3. The segments which the dorsal root fibers of C6-T1 project are longer

from C1 to T8

situate in the intermedial part and the nuclei of proprius cornu dorsalis of the spinal cord. 4. The dorsal root fibers of C6-T1 project to the medulla. Beside pro- jecting to cuneatus nuclei and lateral cuneatus nuclei

they also project to the intermedia nuclei and the reticularis parvicellularis nuclei. The above results provided some evidences of morpholology for the a- cupuncture and acupuncture anesthesia.