File:Frazer1928 plate03.jpg

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Plate III.

A, section through upper part of fourth ventricle, 48 mm.: V, place where fifth nerve appears, immediately above this: nuclear masses associated with the nerve are seen dorsal to this: f. fibres extending between the nerve and nuclei ventrally and the roof of the ventricle dorsally, the innermost fibres reaching l.c., which probably represents the locus caeruleus.

B, section passing in the neighbourhood of the isthmus, 115 mm., to show the flattening down of the root, leaving the translaminar sulcus as the upper limb in a T-shaped cavity. 0, produced by adding several sections from an embryo of 100 mm., to show h. l., the (1?) homolateral roof fibres of the trochlear nerve, joining a separate arched bundle of (contralateral) fibres.

The plane of section is very oblique, and runs dorsally into the cavity of the mid-brain; t.l.s. translaminar sulcus.

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Frazer JE. Development of the region of the isthmus rhombencephali. (1928) J Anat. 63: 7-18. PMID 17104212

Cite this page: Hill, M.A. (2024, April 18) Embryology Frazer1928 plate03.jpg. Retrieved from

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

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