File:Bailey369.jpg

Fig. 369 Diagram of a transverse section through the lower human medulla showing the origin of the X and XII cranial nerves

Schafer.

Ganglion cell of afferent vagus sending central arm (root fiber) to solitary tract (f. s.) and collateral to the nucleus of the solitary tract (f. s. n.). It is not certain that the axones of the cells of this terminal nucleus take the course indicated in the figure, n. amb., nucleus ambiguus and d. n, X, dorsal efferent nucleus of the vagus, both of which send out axones as the efferent root fibers of the vagus.

These two represent the lateral or splanchnic efferent nuclei of this region, n. XII, nucleus of the hypoglossus the axones of which pass out medially as efferent root fibers of the XII. This nucleus represents the medial or somatic efferent nuclei of this region. f. s.. tractus solitarius or descending roots of vagus, glossopharyngeus and facial; d. V., descending spinal root of the trigeminus; r., restiform body; o., inferior olivary nucleus (olive"); pyr.. pyramid.

Text-Book of Embryology: Germ cells | Maturation | Fertilization | Amphioxus | Frog | Chick | Mammalian | External body form | Connective tissues and skeletal | Vascular | Muscular | Alimentary tube and organs | Respiratory | Coelom, Diaphragm and Mesenteries | Urogenital | Integumentary | Nervous System | Special Sense | Foetal Membranes | Teratogenesis | Gallery of All Figures

Historic Disclaimer - information about historic embryology pages

Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Reference

Bailey FR. and Miller AM. Text-Book of Embryology (1921) New York: William Wood and Co.

Cite this page: Hill, M.A. (2024, April 24) Embryology Bailey369.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey369.jpg

What Links Here?

© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G