Sun Shanquan, et al. THE HISTOCHEMICAL IDENTIFICATION OF THE NERVE FIBER CONMPONENTS IN THE SUPERIOR LARYNGEAL NERVE LOOP[J]. Journal of Chongqing Medical University, 1995,(3).
Sun Shanquan, et al. THE HISTOCHEMICAL IDENTIFICATION OF THE NERVE FIBER CONMPONENTS IN THE SUPERIOR LARYNGEAL NERVE LOOP[J]. Journal of Chongqing Medical University, 1995,(3).DOI：
the different parts of the superior laryngeal nerve(SLM) loop from 12 dogs after immediate sacrifice
including communicating branch between su-perior cervical sympathetic ganglion and external laryngeal nerve branch and several segments ofthe mixed trunks
were examined for their acetvlcholinsterase activities to distingush the fibercomponents of the SLN loop
The specimens were fixed with 6% formalin (PH7)for 1h
imbed-ded in gelatin
cut into 7μm slices
mounted in glasses
incubated in the medium prepared accord-ing to Karnovsky and Roots
direction for 24 hrs
and then observed under the light microscope.The results showed that the communicating branch contained mainly unmylinated fiberswhich showed strong enzymatic activity . the mixed nerve trunks consisted of myelinated axons
some of which showed enzamatic activity and others failed to react
and unmyelinated fiberswhich showed strong enzamatic activity. These results demonstrated that the SLN loop is com-posed of motor
sensory nerve fibers and sympathetic postganglion nerve fibers.Therefore
SLNloop is a mixed nerve instead of a motor nerve.
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