A text-book of the diseases of the ear for students and practitioners . maculaeacusticae ; from here several non-nucleated nerve filaments penetrate thebasilar membrane and wind their way, as very delicate, granular fibrillae,between the supporting cells (fibre cells, Retzius) of the epithelium to the 44 690 DISEASES OF THE EAR inferior nucleated, rounded extremity of the hair-cells. According to theinvestigations of Katz, the fibrillae make a turn at this place, running in analmost horizontal direction and form a narrow nerve, plexus, whence theysupply the inferior part of the hair-cells whic
A text-book of the diseases of the ear for students and practitioners . maculaeacusticae ; from here several non-nucleated nerve filaments penetrate thebasilar membrane and wind their way, as very delicate, granular fibrillae,between the supporting cells (fibre cells, Retzius) of the epithelium to the 44 690 DISEASES OF THE EAR inferior nucleated, rounded extremity of the hair-cells. According to theinvestigations of Katz, the fibrillae make a turn at this place, running in analmost horizontal direction and form a narrow nerve, plexus, whence theysupply the inferior part of the hair-cells which they surround in the formof a cup (Retzius, Kaiser). In sections which have been taken from youngmice, and stained by Golgis method (v. Lenhossek, Katz), several nervefibres can be seen to extend to the limit of the section. The union of thevestibular nerve with the hair-cells takes place by means of contact. Theepithelium of the maculae acusticse is covered by a clear, transparent, semi-fluid substance (Steinbrligge) which coagulates after death, and which, in the. Fig. 310.—Horizontal Section through the Vestibule above theFenestra Ovalis of a New-born Infant. Utriculus ; a, Ampulla externus and the crista ampullaris discharging into it;r, Space in which the sacculus is situated ; n, Nerve bundles of the ramusvestibuli, passing to the utriculus and the macula acustica utriculi; », p, Ad-herent Avail of the sacculus (incompletely cut through) ; n, Nerve bundles passingto the macula acustica sacculi; an, Nerve anastomoses running from the nerve-bundle n to n. From a preparation in the authors collection. form of a membrane, surrounds the otoliths or otoconia ; these consist [aismall, hexagonal crystals of carbonate of lime. Schwalbe found smallvacuoles in the middle of the otoliths. The walls of the utricle are united to the superior and medial walls of thevestibule by means of delicate, finely-rneshed connective tissue (Figs. 310,312), and in a like manner the saccule is
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectear, booksubjecteardi
