Quain's elements of anatomy . sp. a). In thetract between this prominence and the membrane of Reissner, the sub-stance of the periosteum is also fi-equently pigmented, and from con-taining large and numerous blood-vessels, the capillary loops of whichmay even project between the bases of the epithelium-cells, is termedstria vascularis (St. v.). Irmnediately beneath the epithelium of theouter wall is a basement membrane, through which, in section, cell- 460 THE EAE. processes may here and there be seen passing into the epithelium fromthe subjacent connective tissue. The spiral ligament (fig. 40
Quain's elements of anatomy . sp. a). In thetract between this prominence and the membrane of Reissner, the sub-stance of the periosteum is also fi-equently pigmented, and from con-taining large and numerous blood-vessels, the capillary loops of whichmay even project between the bases of the epithelium-cells, is termedstria vascularis (St. v.). Irmnediately beneath the epithelium of theouter wall is a basement membrane, through which, in section, cell- 460 THE EAE. processes may here and there be seen passing into the epithelium fromthe subjacent connective tissue. The spiral ligament (fig. 400, Lsp) appears in section as a tri-angular prominence attached to the outer waU of the cochlea, with thebasilar membrane prolonged from its apex. It is composed of a retiformconnective tissue, many of the cells of which have an elongated shapeand radiate from the point of attachment of the basilar have been considered by some to be muscular, but there is nodistinct proof of their contractile nature. Fig. Fig. 400.—Vertical section of the first turn op the cochlea op a child a YEAR AND A HALF OLD. 100 DIAMETERS (Waldeyer). SV, scala vestibuli; ST, scala tympani; DC, duct or canal of the coclilea; ^,„, vestibular and tympanal layer of the osseous spiral lamina with the stratum ofnerve-fibres, N, between ; a, a, outer bony wall of the cochlea ; h, b, and d, periosteum ;e, e, connective tissue thickening forming at the spiral ligament ; , striavascularis ; , prominence known as the accessory spiral ligament, containing aspirally running blood-vessel, the vas prominens ; , spiral groove (inner) ; ,so-called external spiral groove ; R, R^, section of Reissners membrane, the middle partindicated only by a dotted line ; from R to C?., limbus laminte spiialis ; 31. t., membranatectoria, somewhat raised up from its natural position ; /—p, organ of Corti ; /, nervesturning up to enter epithelium ; g, inner hair-cell reg
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
