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Shinichi Abe,Masayuki Fukuda,Shigeki Yamane,Hideki Saka,Yukio Katori,Jose Francisco Rodrí,guez-Vá,zquez,Gen Murakami 대한해부학회 2013 Anatomy & Cell Biology Vol.46 No.2
We examined pharyngeal nerve courses in paraffin-embedded sagittal sections from 10 human fetuses, at 25–35 weeks of gestation, by using S100 protein immunohistochemical analysis. After diverging from the glossopharyngeal and vagus nerves at the level of the hyoid bone, the pharyngeal nerves entered the constrictor pharyngis medius muscle, then turned upward and ran superiorly and medially through the constrictor pharyngis superior muscle, to reach either the levator veli palatini muscle or the palatopharyngeus muscle. None of the nerves showed a tendency to run along the posterior surface of the pharyngeal muscles. Therefore, the pharyngeal nerve plexus in adults may become established by exposure of the fetal intramuscular nerves to the posterior aspect of the pharyngeal wall because of muscle degeneration and the subsequent rearrangement of the topographical relationship between the muscles that occurs after birth.