From Embryology

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Fig. 432. Construction of the brain of a 19 mm. human embryo (7.5 weeks)

Showing the stage of development of some of the principal fiber-systems.


C.C., posterior commissure; F. s., tractus solitarius; F. t., fasciculus spinalis trigemini (spinal V); K, nuclei of dorsa! funiculi of cord; L., medial longitudinal fasciculus; M., fasciculus retroflexus of Meynert; Ma., mammillary bundle; n. i., nervus intermedius; O., olive; Ol., olfactory nerve; S., fillet; St., stria medullaris thalami; T., thalamic radiation; T. o., tractus opticus; V, Gasserian ganglion; VII, facial nerve and geniculate ganglion; VIII, ganglia of acoustic nerve; IX, N. glossopharyngeus; X, N. vagus.

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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)


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

Cite this page: Hill, M.A. (2024, April 17) Embryology Bailey432.jpg. Retrieved from

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current01:38, 30 January 2011Thumbnail for version as of 01:38, 30 January 2011794 × 635 (92 KB)S8600021 (talk | contribs){{Template:Bailey 1921 Figures}} Category:Neural