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THE POPULAR SCIENCE MONTHLY. 



many pathologists are disposed to regard it as substantially correct. 

 It would seem just, then, to connect these central functions which are 

 concerned in speech with the peculiarly developed region of the human 

 brain that lies on the anterior and lower limit of the Sylvian fissure ; 

 Wundt adds that perhaps the Island of Reil should be joined to this 

 territory. 



We are now brought to consider directly the relation of portions 

 of the brain to specific states of consciousness. I shall state the loca- 

 tion of the senses as formerly made by Ferrier and by Munk, and will 

 give a specimen experiment from each investigator. Sight is located 

 by Ferrier in the angular gyrus (A, Fig. 1), by Munk in the occipital 

 lobe (O, Fig. 1) ; hearing, by both, in the temporo-sphenoidal lobe 

 (H, Fig. 1). Ferrier places smell and taste in the lower and inner 

 aspect of the temporo-sphenoidal lobe (IT, Fig. 4). These centers are 

 not distinguished by Munk. Ferrier names also a tactile center (H, 

 Fig. 4). This he locates in what is known as the hippocampal region. 

 If we separate the hemispheres from one another by cutting through 

 the corpus callosum, we shall obtain a view of the median aspect of 

 the hemispheres (see Fig. 4). 



Attention has been called to the fact that Munk disagrees with all 



Fig 4. Median View op Eight Hemisphere of Human Bkain. (Ecker.) c c, Corpus callo- 

 sum, connecting band between the hemispheres, longitudinally divided ; w, lower and inner 

 portion of temporo-sphenoidal lobe, center of smell, according to Ferrier; H, hippocampal 

 fold, touch. 



the authorities, except Schiff, in maintaining that a destruction of the 

 motor centers destroys sensibility. Munk, therefore, does not indicate 

 a special tactile center, but finds centers of feeling for head, neck, and 

 back. 



Ferrier's experiment with regard to vision was as follows : He 

 chloroformed the animal, a monkey, and destroyed the angular gyrus 



