Holden's Manual of the dissection of the human body / edited by Luther Holden ... and John Langton, ... ; illustrated with numerous wood engravings.

  • Luther Holden
Date:
1879
Catalogue details

Licence: Public Domain Mark

Credit: Holden's Manual of the dissection of the human body / edited by Luther Holden ... and John Langton, ... ; illustrated with numerous wood engravings. Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

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    outwards by a thick membrane, the basilar membrane (fig. 168) ; thus dividing the tube into an upper canal, the scala vestibuli, and a lower, the scala tympani. The upper scale is subdivided by an oblique membrane-—membrane of Reissner—into two canals, an inner, the scala vestibuli, and an outer, the d/actus cochlearis. The ductus cochlearis or scala media terminates at the helicotrema in a cul-de-sac; inferiorly it is connected with the cavity of the saccule by a long, narrow duct, called the canalis reuniens. On examining the membranous continuation of the lamina spiralis, it is seen, not far from its attachment to the osseous zone, Fig. 168. DIAGEAMMATIC SECTION OF A COII. OF THE COCHLEA. (From Quain.) s V. Scala vestibuli. D c. Ductus cochlearis. s T. Scala tympani. m R. Membrane of Eeissner. lis. Limbus laminae spiralis. m T. Membrana tectoria. r c. Rods of Corti. m b. Membrana bosilaris. Is p. Ligamentum spirale. s s. Sulcus spiralis. g s. Ganglion spirale. to be thickened into an elongated crest, the limbus, which over- hangs a groove, called the sulcus spiralis. The structure of the limbus consists of firm connective tissue, on the under part of which are found numerous cells. The basilar membrane forms, at the base of the cochlea, but a small breadth of the septum, the broadest part being formed of bone, but it gradually increases in breadth towards the cupola, where it constitutes nearly the entire septum.
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