538 PHRENOLOGY : OLD AND NEW. 



manent, when the same part was destroyed on both 

 sides.* 



Destruction of the whole of the tip of one Temporal 

 Lobe, was found to produce a temporary loss of Smell on 

 the same side and loss of Taste on the opposite side. 



In regard to the seat of the ' centre ' for Tactile and 

 Common Sensibility, some difficulty was at first experi- 

 enced in fixing upon any site which seemed especially 

 concerned w r ith such impressions. Ferrier says : " After 

 numerous experiments, in which almost the whole outer 

 surface of the hemisphere had been successively destroyed 

 without causing loss of the sense of touch, it seemed to 

 me strange if such an important intellectual sense should 

 not, like the others, have a special centre in the hemi- 

 sphere. My attention was, therefore, directed to the inner 

 aspect of the temporo-sphenoidal lobe, and to devise a 

 method by which this region might be reached and 

 destroyed." Ferrier soon succeeded in getting at this region 

 from behind, and his subsequent experiments induced him 

 to regard the ' hippocampus major ' and the overlying 

 'uncinate convolution ' as the parts which are specially to be 

 regarded as the centre for Tactile Impressions (fig. 177). 

 Destruction of this region causes complete loss of sensibility 

 in the opposite half of the body, and that, too, of a more 

 permanent character than the diminution which occurs in 

 other modes of sensibility from unilateral destruction of 

 their convolution al ' centres ' a result which is so far in 

 exact accordance with what may be frequently recognized 

 as the effect of disease of the Brain in Man. j- 



* Terrier says : " With the abolition of taste, cutaneous sensibility 

 of the tongue was also abolished, a fact indicating the association 

 in the hemisphere of the centres of tactile and special sensation in 

 the tongue." (Loc. cit. p. 189.) 



f " Paralysis from Brain Disease," 1875, pp. 109, 121. 



