An American text-book of physiology . ting basis a series ofpeculiarly modified epithelial cells, known as the rods of Coiii (Fig. 282, b, b), 822 AN AMERICAN TEXT-BOOK OF PHYSIOLOGY. which are disposed iiloug the edge of the spiral lamina iu two rows, an innerand an outer. The inner rods have their feet on the basilar membrane near itsmedian attachment; thoy lean outward and upward, and at their uj)pcr extrem-ity join or articulate with the heads of the outer rods, whose feet are fastened tothe basilar membrane more exteraally. The two rows of rods are thus joinedtogether like the rafters of
An American text-book of physiology . ting basis a series ofpeculiarly modified epithelial cells, known as the rods of Coiii (Fig. 282, b, b), 822 AN AMERICAN TEXT-BOOK OF PHYSIOLOGY. which are disposed iiloug the edge of the spiral lamina iu two rows, an innerand an outer. The inner rods have their feet on the basilar membrane near itsmedian attachment; thoy lean outward and upward, and at their uj)pcr extrem-ity join or articulate with the heads of the outer rods, whose feet are fastened tothe basilar membrane more exteraally. The two rows of rods are thus joinedtogether like the rafters of a house, and enclose beneath them a canal knownas the tunnel of the organ of Corti. The inner rods arc more numerous thanthe outer, so that the latter are fastened rather between than to the ends of theformer. Leaning against the inner or median side of the inner row of rodsis a single row of hair-cells (Fig. 281), much like those described as seated onthe maculae and cristas of the labyrinth, to which hair-cells filaments of the ) Fig. 281.—Diagram of the organ of Corti (from Foster, after Retzius): , inner rod of Corti; , outerrod of Corti; , inner hair-cell; , the group of nuclei beneath it; , outer hair-cells, or cells ofCorti; CD, the twin cells of Deiters (four rows); , the auditory nerve perforating the tympanic lip,U, and lost to view among the nuclei beneath the inner hair-cells; , the inner spiral strand of nerve-fibrils ; t.»pn, the spiral strand of the tunnel; , the outer spiral strand belonging to the first row ofouter hair-cells ; the three succeeding spiral strands belonging to the three other rows are also shown;nerve-fibrils arc shown stretching radially across the tunnel; , Hensens cells; , Claudius cells;, lymphatic epithelioid lining on the side toward the seala tympani; l(/.sp, ligamentum spirale; c, cellslining the spiral groove, overhung by the vestibular lip,/.r; , tectorial membrane; a fragment,
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Keywords: ., bookautho, bookcentury1800, bookdecade1890, booksubjectphysiology
