File:Journal of comparative neurology (1916) (14780794121).jpg

Identifier: journalofcompara26wist (find matches)
Title: Journal of comparative neurology
Year: 1916 (1910s)
Authors: Wistar Institute of Anatomy and Biology
Subjects: Neurology Comparative neurobiology Neurology Medicine
Publisher: Philadelphia, Pa. : Wistar Institute of Anatomy and Biology
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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32S G. E. COGHILL Figs. 51 to 54 Early swimming stage (No. 557, sections 2-1-1,5,7,11). X 200.Four sections selected from a transverse series through the brain in the vicinityof the entrance of the root of the trigeminal nerve. The massing of theganglia against the brain is shown here, a relation which should be noted in thestudy of figures 1-4. Figure 51 is the most rostral in this set, and figure 54 themost caudal. In figure 51 the ophthalmic ganglion (G.oph.) appears with acrescentic piece of the Gasserian ganglion (G.G.) on its ventral surface. Thefibers from this ganglion enter in figure 52 (R.oph.)., while the root of the Gasserianganglion enters in figure 53 (R.G.G.) more dorsally. This section is 28 m caudadof the last. In figure 54 the motor root of the nerve appears. THE NERVOUS SYSTEM OF AMPHIBIA 329 Fourth Ventricle
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R.Vm 330 G. E. COGHILL Figs. 55 to 60 Early swimming stage (No. 496, sections 1-5-4 to 9). X 500.Six successive serial transverse sections through the entrance of the roots of theseventh and eighth nerves into the brain. Figure 55 is the most rostral of theset. In this figure the ascending divisions of the lateral line component (L.L.VII,Asc.a,b) and the roots of the visceral sensory component iR.Vn,Vis.) andthe auditory root R.VIII) are beginning to enter. The lateral line roots (R.L.L.VII,a,b) enter in figures 56 to 59. In figure 58, 59 and 60 the fibers of the vis-ceral sensory component have become the fasciculus solitarius (Fas.Sol.), andthe descending auditory root fibers (yiII,Des.) appear along the dorsal marginof the descending trigeminal tract (Tr.Des.V). Neurones of the second order(Neu. II) here lie across the entire sensory zone. These figures should be com-pared with figure 6. THE NERVOUS SYSTEM OF AMPHIBIA 331 LLVIIAsc Neu.ll

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