THE AUDITORY APPARATUS 



197 



gular in cross-section (Fig. 92) and contains the specific auditory 

 receptive epithelium in the spiral organ, or organ of Corti. 



Membi 

 vestibularia 



Inner hair cell 



Membrana basilaris 

 Outer hair cells 



Fig. 92. Section across the ductus cochlearis (scala media) to illustrate 

 the relations of the spiral'organ (organ of Corti). (After Retzius.) 



Membrana tectoria 

 Sulcus spiralis interims 

 Iambus lamina 1 spiralis 



Inner rod of Corti 



Outer rod of Corti 

 Inner hair cell I 1 Outer hair cells 

 Hensen's stripe | | Cells of Hensen 



Membrana basilaris 



Cells of Claudius 



Inner spiral fasciculus 



Vas spirale 

 Tunnel of Corti 



GJ<> Q.O- .,- ** ., '-Vcr 



Cells of Deiters 



Space of Nuel 



Fig. 93. Section across the spiral organ (organ of Corti) from the central 

 coil of the ductus cochlearis. (After Retzius.) 



The generally accepted structure of the spiral organ, as presented in 

 the classical researches of Retzius, is shown in Fig. 93. Upon a basement 

 membrane (Fig. 92, membrana basilaris) is a very highly differentiated 



