The anatomist's vade mecum : a system of human anatomy . ni of thefirst turn of the cochlea. 5, 5. The scala vestibuli of the first turn; theseptum between 4 and 5 is the lamina spiralis; a filament of the cochlearnerve is seen passing between the layers of the lamina to be distributed uponthe membrane which invests the lamina. 8. Loops formed by the filamentsof the cochlear nerve on the lamina spiralis. 9, 9. Scala tympani of thesecond turn of the cochlea. 10, 10. Scala vestibuli of the second turn ; theseptum between the two is the lamina spiralis. 11. The remaining half turnof the scala ves
The anatomist's vade mecum : a system of human anatomy . ni of thefirst turn of the cochlea. 5, 5. The scala vestibuli of the first turn; theseptum between 4 and 5 is the lamina spiralis; a filament of the cochlearnerve is seen passing between the layers of the lamina to be distributed uponthe membrane which invests the lamina. 8. Loops formed by the filamentsof the cochlear nerve on the lamina spiralis. 9, 9. Scala tympani of thesecond turn of the cochlea. 10, 10. Scala vestibuli of the second turn ; theseptum between the two is the lamina spiralis. 11. The remaining half turnof the scala vestibuli; the dome placed over this half turn is the cupola ; aline leads from the numeral to the remaining half turn of the scala lamina of bone which forms the floor of the scala vestibuli curves spirallyround to constitute the infundibulum (2). 14. The helicotrema throughwhich a bristle is passed; its lower extremity issues from the scala tympaniof the middle turn of the cochlea. The hamulus laminae spiralis is seen infront of the 524 SCALA TYMPANI ET VESTIBULI. Fig. 173. cochlea. At the apex of the cochlea, the lamina spiralis terminatesby a pointed, hook-shaped process, the hamulus laminae spiralis. Thetwo scalse of the cochlea, which are completely separated throughouttheir length in the living ear, communicate superiorly, over the hamulus laminse spiralis, by means of anopening common to both, whichhas been termed by Breschethelico-trema (fcXi^, tXiaah) vol-vere—rprifia). Inferioily, oneof the two scalee, the scala ves-tibuli, terminates by means of anoval aperture in the anterior ven-tricle of the vestibule; while theother, the scala tympani, becomessomewhat expanded, and opensinto the tympanum through thefenestra rotunda (fenestra coch-lese). Near the termination of thescala tympani is the small open-ing of the aquseductus cochleae. The internal surface of the os-seous labyrinth is lined by ajibro-serous membrane, which is analo-gous to the dura m
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
