392 



LABORATORY MANUAL OF HUMAN ANATOMY 



In the vestibulum examine the following : 



(a) Spherical recess (recessus sphaericus) (0. T. fovea hemisphaerica), 



(V) Elliptical recess (recessus ellipticus) (0. T. fovea hemielliptica). 



(c) Crest of vestibule (crista vestibuli). 



(d) Pyramid of vestibule (pyramis vestibuli}. 



(e) Cochlear recess (recessus cochlearis). 



(f) Perforated spots (maculae cribrosae). 



(fa) Superior (macula cribrosa superior). 



(fb) Middle (macula cribrosa media). 



(fc) Inferior (macula cribrosa inferior). 



(g) Osseous semicircular canals (canales semicirculares ossei). 



(ga) Superior (canalis semicircular is superior). 



(gb) Posterior (canalis semicircularis posterior). 



(gc) Lateral (canalis semicircularis lateralis) (0. T. external). 



Ampulla ossea superior 



Canalis semicircularis, 

 superior 



Recessus ellipticus v 



Ampulla ossea. 

 lateralis 



Canalis semi- 

 circularis 

 lateralis 



Canalis semi- 

 circularis 

 posterior 



FIG. 194. 



Apertura interna aquaeductus vestibuli 



Crista vestibuli with the macula cribrosa superior 

 / Canalis facialis (Falloppii) 



Recessus sphaericus with the 

 macula cribrosa media 



Cochlea 



__Scala tympani 



Opening of the crus commune 



Ampulla ossea posterior 



Macula cribrosa inferior \ 

 Fenestra cochleae 



Lamina spiralis ossea 

 Scala vestibuli 



Recessus cochlearis 

 Apertura interna canaliculi cochleae 



The bony labyrinth of the right ear, seen from in front. The lateral wall of the vestibule has been 

 removed and the semicircular canals opened up in their entire length. (After Toldt, Anat. Atlas, Wien 

 1903, 3 Aufl., p. 930, Fig. 1442.) 



(h) Osseous ampullae (ampullae osseae). 



(ha) Superior (ampulla ossea superior). 



(hb) Posterior (ampulla ossea posterior). 



(he) Lateral (ampulla ossea lateralis). 

 (i) Ampullary limbs (crura ampullaria). 



(ia) Common limb (crus commune). 



(ib) Simple limb (crus simplex). 



In the cochlea study 



(a) Cupola (cupula cochleae). 



(b) Base (basis cochleae). 



(c) Spiral canal of cochlea (canalis spiralis cochleae), 



