THE CEREBRUM 587 



>rganic matter in solution on the terminal portions of the gustatory nerves, 

 ire transmitted to the cortical area is considered in connection with the 

 ense of taste. 

 The Olfactory Area. The area for olfactory sensibility has been assigned 



to the anterior portion of the hippo-campal convolution (the uncinate 



region) and the anterior portion of the callosal convolution or gyrus 



fornicatus. 



Disease processes in this region give rise frequently to subjective sensa- 

 tions of odors which as a rule are of an unpleasant character. Destruction 

 of this area is followed by a loss of odor sensations. Electric stimulation 

 of this area in mammals was found by Ferrier to be attended with a peculiar 

 torsion of the nostril and lips on the same side similar to the reaction brought 

 about by the application of an odorous substance more or less disagreeable 

 to the nostril. 



The afferent pathway, by which nerve impulses developed in the ter- 

 minal portion of the olfactory nerve by the contact of odorous particles are 

 transmitted to the cortical areas, is considered in connection with the 

 olfactory nerve. 

 6. The Auditory Area. The area of auditory sensibility has been assigned 



to portions of the temporal lobe and may be divided into primary and 



secondary areas. 



The primary area is located in the posterior portion of the super- 



temporal convolution, and perhaps the posterior portion of the msula. 



The secondary areas are located one below and in advance, and the other 



below and some what behind the primary area, both extending into the 



medi-temporal convolution. 



Unilateral destruction of the primary area is followed, however, only 

 by a partial loss of hearing in the opposite ear, owing to partial decussation 

 of the auditory nerve, which, however, may be recovered from, after a time, 

 owing probably to a compensatory activity of the insular convolution. 

 Bilateral destruction of this region is followed by complete deafness. 

 primary area is connected on the one hand with the basal auditory center 

 (the internal geniculate body) by the auditory radiation, and on the other 





 <s * 



ih," UghteTide, The am. holds true for the [.reept.or, of senM.ons of 



**%Sa* 5.'*,% which ne,,e impute, developed in the terminal 

 pjons Sfhe , P udito,, 7 n by the imp.c, of atmo.phenc vibrat, ., 

 Iransmitted to the auditory are., is considered in connecu 



