5t) PSYCHOLOGY. 



aphasia wliicli he was able to collect, fiuds that the lesions 

 eoiicentrate themselves iu three places : first, ou Broca's 

 ■centre ; second, on Wernicke's ; third, ou the supra-marginal 

 and angular gyri under which those fibres pass which con- 

 nect the visual centres with the rest of the brain* (see Fig. 

 17). With this result Dr. Starr's analysis of purely sensory 

 oases agrees. 



Fig. 17 



In a later cfiapter we shall again return to these differences 

 in the effectiveness of the sensory spheres in different 

 individuals. Meanwhile few things show more beautifully 

 than the history of our knowledge of aphasia how the 

 sagacity and patience of many banded workers are in time 

 certain to analyze the darkest confusion into an orderly 

 display.f There is no * centre of Speech' in the brain any 

 more than there is a faculty of Speech in the mind. The 

 entire brain, more or less, is at work in a man who uses 

 language. The subjoined diagram, from Ross, shows the 

 lour parts most critically concerned, and, in the light of our 

 text, needs no farther explanation (see Fig. 18). 



*Nothnagel und Naunj'n • op. cit., plates. 



t Ballet's and Bernard's works cited on p. 51 are the most accessible 

 documents of Charcot's school. Bastian's book on the Brain as an Organ 

 of Mind (last three chapters) is also good. 



