1010 FUNCTIONS OF THE ORGAN OF CORTI. [BOOK in. 



modified epithelium cells, and we shall presently find that modi- 

 fied epithelium cells also play an essential or important part in 

 the development of sensations other than those of vision and 

 hearing. We may conclude that the vibrations of the peri- 

 lymph in some way or other bring about such changes in the 

 hair-cells as to give rise to auditory impulses. What is the 

 exact nature of these changes and what is the exact way in 





FIG. 180. DIAGRAM OF A TRANSVERSE SECTION OF A WHORL OF THE COCHLEA. 

 Sc.v. Scala Vestibuli. Sc. T. Scala Tympani. C.chl. Canalis cochlearis. 



n.aud. auditory nerve. Gg.sp. Spiral ganglion. Lam.sp. Lamina spiralis. 

 Ib. limbus. L.v. labium vestibulare. Lt. labiuni tympani. m.R. membrane of 

 Reissner. Lg.sp. spiral ligament. Str.v. stria vascularis. Org. C. organ of 

 Corti. m.b. basilar membrane, t.l. lymphatic epithelioid lining of the basilar 

 membrane on the tympanic side. m.t. tectorial membrane. 



