536 PHRENOLOGY: OLD AND NEW. 



tip of the Temporal Lobe (or, indeed, the actual continuity 

 which exists between these parts in many animals), as 

 Ferrier says, "might of itself be regarded as establishing 

 strong grounds for a physiological connection between this 

 region and the sense of smell." He adds : " In the monkey 

 and in man the direct connection between the outer root 

 of the comparatively small olfactory tract and the 

 subiculum * is not so evident, though in the monkey it 

 is more apparent than in man. The origin of this so- 

 called root from the subiculum is, however, thoroughly 

 established by microscopical investigation." 



A lesion of one subiculum was found to cause diminu- 

 tion or abolition of Smell on one side, viz., the side of 

 lesion — thus confirming the direct relation above indicated. 

 For, as Ferrier points out,f " Neither the inner roots which 

 fuse with the gyrus fornicatus on each side, nor the outer 

 roots which are connected with the subicula, and thence 

 through the posterior pillars of the fornix with the optic 

 thalami, undergo decussation, and hence there is no 

 anatomical basis of cross connection between the olfactory 

 bulbs and their cerebral centres." Destruction of both 

 these regions, was found to cause loss of Smell on both 

 sides, of a permanent character. } 



* This name is given to the inner part of the tip of the Tempo- 

 ral Lobe, or more precisely to the tip of the * uncinate convolution,' 



t Loc. cit. p. 185. 



X An attempt to explain the lack of decussation of the olfactory 

 channels has been hazarded on p. 482. The sense of Smell (the 

 organs of which are situated on each side of the middle line of the 

 body) is just that mode of sensibility in which no discrimination is 

 ever made between the impressions coming from the two sides. No 

 sort of disturbance or embarrassment would therefore seem likely 

 to be produced from the fact that impressions of smell from the 

 right nostril, are brought into relation in the corresponding Cere- 

 bral Hemisphere with gustatory, visual, auditory, and tactile im- 

 pressions emanating from the left side of the body, and vice versa. 



