CEREBRAL LOCALIZATION 



231 



1. The motor centre, controlling utterance, in 

 Broca's convolution (the third left frontal). 



2. The auditory word centre, appreciating spoken 

 language, in the posterior part of the second left 

 temporal convolution. This was also regarded as 

 dominating and being necessary for the activity of 

 the other two centres. 



3. The visual word centre, appreciating written 

 language, in the left angular gyrus, behind and above 

 the auditory word centre. 



Recently, however, the searching analyses of Marie 

 and his pupils have raised very grave doubts about 

 the first and third of the above, and many neuro- 

 logists have agreed that Broca's convolution has no 

 speech function at all ; very few now defend the 

 existence of a separate visual word centre. 



Briefly, the contention of Marie and Moutier may 

 be put thus. Between 1861 and 1906, there have 

 been published 304 cases of aphasia with autopsy. 

 Of these 201 were useless and 103 were relevant. 



Useless 



Relevant - 



(Lesion too extensive - - - I75 

 (Badly described - - - - 26 20i 

 /■Favourable to /Cortical lesions with 



J aphasia - - 8 



1 Subcortical lesions 

 ( with aphasia - 11 19 



/Aphasia, but Broca's 



convolution normal 57 

 No aphasia, but 

 Broca's convolu- 

 tion destroyed (in 

 two cases, bilateral 

 destruction) - - 27 84 



Broca's local- 

 ization 



Unfavourable 

 to Broca's 

 localization 



.S04 



