The Journal of nervous and mental disease . unyn treats of the subject of cortical localization withspecial reference to aphasia ; he has examined the literature verycarefully (he has not apparently had access to American litera-ture), and has noted the lesions found in these cases upon a chartof the brain. As a result of this study, he finds that there are three distinctsets of lesions in the various forms of aphasia. The first set is confined chiefly to Brocas convolution (puremotor aphasia); the second set to the posterior two-thirds of thefirst temporal convolution (aphasia with word-deafn
The Journal of nervous and mental disease . unyn treats of the subject of cortical localization withspecial reference to aphasia ; he has examined the literature verycarefully (he has not apparently had access to American litera-ture), and has noted the lesions found in these cases upon a chartof the brain. As a result of this study, he finds that there are three distinctsets of lesions in the various forms of aphasia. The first set is confined chiefly to Brocas convolution (puremotor aphasia); the second set to the posterior two-thirds of thefirst temporal convolution (aphasia with word-deafness) ; thethird set to the transition from the angular gyrus to the occipitallobe (aphasia with word-blindness). This proves conclusivelythat, as the present writer has long since been in the habit ofteaching, instead of there being any one speech centre, widely dif-ferent parts of the cortex subserve the functions of language. Theamount of information which Prof. Naunyn has been able to con-dense into the short resume is quite VOL. XIV. September and October, 1887. Nos. 9 and 10. THE Journal OF Nervous and Mental Disease. ©rigtual ^vtitlzs. ON ARRESTED CEREBRAL DEVELOPMENT,WITH SPECIAL REFERENCE TO ITS COR-TICAL By B. SACHS, , NEW YORK. OUR knowledge of the pathological substratum of thevarious forms of mental derangement is still veryimperfect. In the majority of cases, there may beno marked changes in the structure of the brain ; or, ifthere be any changes at all, they are entirely beyond ourken, and cannot be made out by our present methodsof investigation. As mental pathology is in its infancy, itis but natural that we should first seek for structuralchanges in those conditions in which the departure fromthe normal is greatest, in which the mind is disturbed, asa whole, and not merely with reference to a single part orfaculty; though I shall at once declare my belief that derangement of a part of the mind means disorganization,more or less com
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