RT Journal Article T1 Fetal anatomy of the upper pharyngeal muscles with special reference to the nerve supply: is it an enteric plexus or simply an intramuscular nerve? A1 Abe, Shinichi A1 Fukuda, Masayuki A1 Yamane, Shigeki A1 Saka, Hideki A1 Katori, Yukio A1 Rodríguez Vázquez, José Francisco A1 Murakami, Gen AB 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. PB Korean Association of Anatomists SN 2093-3665 YR 2013 FD 2013 LK https://hdl.handle.net/20.500.14352/110549 UL https://hdl.handle.net/20.500.14352/110549 LA eng NO Abe, S., Fukuda, M., Yamane, S., Saka, H., Katori, Y., Rodríguez-Vázquez, J. F., & Murakami, G. (2013). Fetal anatomy of the upper pharyngeal muscles with special reference to the nerve supply: is it an enteric plexus or simply an intramuscular nerve?. Anatomy & cell biology, 46(2), 141–148. https://doi.org/10.5115/acb.2013.46.2.141 NO Tokyo Dental College NO Ministry of Education, Culture, Sports, Science and Technology (Japan) DS Docta Complutense RD 22 dic 2025