Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . lbranches of the second or third order, would be an especiallyinteresting study, when occurring in the Sylvian region. Itis in that large field that experimentation tends to place thefamous motor centres ; it is there also that clinical experience,aided by pathological anatomy, has located the faculty ofarticulate language. So it is important that we should be well acquainted withthe principal branches rising from the Sylvian artery, andclosely examine their distribution in the fundamental

Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . lbranches of the second or third order, would be an especiallyinteresting study, when occurring in the Sylvian region. Itis in that large field that experimentation tends to place thefamous motor centres ; it is there also that clinical experience,aided by pathological anatomy, has located the faculty ofarticulate language. So it is important that we should be well acquainted withthe principal branches rising from the Sylvian artery, andclosely examine their distribution in the fundamental Stock Photo
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Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . lbranches of the second or third order, would be an especiallyinteresting study, when occurring in the Sylvian region. Itis in that large field that experimentation tends to place thefamous motor centres ; it is there also that clinical experience, aided by pathological anatomy, has located the faculty ofarticulate language. So it is important that we should be well acquainted withthe principal branches rising from the Sylvian artery, andclosely examine their distribution in the fundamental convo-lutions of that region. The Sylvian artery divides into, or at least gives rise to, four principal branches. The distribution of these brancheshas been carefully studied by Duret and by Heubner. (SeeFigs. 9 and 12.) The first Duret calls frontal-external and inferior. That ARTERIAL CIRCULATION IN THE BRAIN. 53 is really the artery of the third frontal convolution (convolu-tion of Broca). I have myself several times seen an oblitera-tion of this arterial trunk produce a softening confined to the. Fig. 12.—Vascular territories of the superior cerebral surface. (Daret.) Thedotted lines indicate the territories of the anterior, middle and posterior arteries. territory of the third convolution (in its posterior part). Ihere add a conclusively corroborative fact. The case wasa woman named Farn.... observed at Salpetriere. She wasattacked with aphasia. There had existed no trace of paral-ysis either of motion or sensation. Aphasia was in this case 54 DISEASES OF THE BRAIN. the only symptom, and atrophy of the third convolution wasalso the only corresponding lesion revealed by autopsy.(Figs. 13 and 14.) This is incontestably a fine example of cere-bral localization. The second branch of the Sylvian is the anterior parietalartery of Buret. I prefer to term it the artery of the ascend-ing frontal convolution (Fig. 9 and Fig. 12).

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