A text-book of the diseases of the ear and adjacent organs . ons of UrbanPritchard,* in such a manner that the medullated nerve-fibres, after anas-tomosing several times, spread out in the connective-tissue layer of the maculaacustica, from which non-medullated nerve-filaments penetrate the hyalinelayer to the epithelium, and are comiected with the base of the auditorycilia (Retzius).The neuro-epithelium of the macula acustica is covered with a clear. * • The Termination of the Xerves of the Vestibule and Semicircular Canals Quar. Jour, of Med. Science, 1876. 592 THE SACCULES OF THE VESTIBULE.
A text-book of the diseases of the ear and adjacent organs . ons of UrbanPritchard,* in such a manner that the medullated nerve-fibres, after anas-tomosing several times, spread out in the connective-tissue layer of the maculaacustica, from which non-medullated nerve-filaments penetrate the hyalinelayer to the epithelium, and are comiected with the base of the auditorycilia (Retzius).The neuro-epithelium of the macula acustica is covered with a clear. * • The Termination of the Xerves of the Vestibule and Semicircular Canals Quar. Jour, of Med. Science, 1876. 592 THE SACCULES OF THE VESTIBULE. transparent, semi-fluid substance (Steinbriigge), which after death coagulatesand covers the small hexagonal crystals of carbonate of lime, the otoliths, asa membrane. Schwalbe found small vacuoles in the middle of the otoliths. The walls of the utriculus are fastened to the upper and median wall of thevestibule by means of a delicate fine-meshed connective tissue (Figs. 299 and301). In a similar manner, the saccule is fastened to the medial wall of the. Fig. 301.—Frontal Section through the Vestibule and the Fenestra Ovalisof a New-born Infant. u, Utriculus, attached to the medial and upper walls of the vestibule ; ma, Freelateral wall of the utriculus; st, Fenestra ovalis and stapes ; c, Cisterna peri-lymphatica ; n, n, n, Nerve bundles of the ramus vestibuli passing to the utriculusand ampullae ; a, Ampulla inferior. ; ca, Crista ampullaris ; /, Nervus a preparation in my collection. recessus sphericus. Between both saccules and the lateral wall of the vesti-bule (Fig. 301) is a considerable perilymphatic space (Steinbriigge), which iscalled by Ketzius the cisterna perilymphatica vestibuli.* * To study the comparative anatomy of the membranous labyrinth I would recom-mend, besides the work by Retzius : Gehororgane der Wirbtlthiere, Stockholm, 1881and 1884 ; the excellent work of Prof. Kuhn : Beitrdge zur Anatomie des Gehbr-organs, Bonn, 1S80, and Prof. C.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
