Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . tempt a rigorous description ; I propose only to draw ageneral outline, a knowledge of which is indispensable to ourobject. To simplify a very complex situation, I will confinemyself to the brain ; that is, to that mass of nervous substancecomposed of two hemispheres and situated at the superiorextremity of what are called the cerebral peduncles (cruracerebri). The two hemispheres are nearly symmetrical, and so nearlyidentical in their structure that whatever may be said of theone may, anat

Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . tempt a rigorous description ; I propose only to draw ageneral outline, a knowledge of which is indispensable to ourobject. To simplify a very complex situation, I will confinemyself to the brain ; that is, to that mass of nervous substancecomposed of two hemispheres and situated at the superiorextremity of what are called the cerebral peduncles (cruracerebri). The two hemispheres are nearly symmetrical, and so nearlyidentical in their structure that whatever may be said of theone may, anat Stock Photo
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The Reading Room / Alamy Stock Photo

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2AN456R

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1439 x 1737 px | 24.4 x 29.4 cm | 9.6 x 11.6 inches | 150dpi

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Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . tempt a rigorous description ; I propose only to draw ageneral outline, a knowledge of which is indispensable to ourobject. To simplify a very complex situation, I will confinemyself to the brain ; that is, to that mass of nervous substancecomposed of two hemispheres and situated at the superiorextremity of what are called the cerebral peduncles (cruracerebri). The two hemispheres are nearly symmetrical, and so nearlyidentical in their structure that whatever may be said of theone may, anatomically speaking, rigidly apply to the other.Each one is enveloped in a layer of gray substance. The 4 DISEASES OF THE BRAIN. central part is formed by a mass of white substance, in whichare furrowed the ventricles, and where are also seen, as iflocked together, the central ganglionic masses, namely, thethalami optici and the corpora striata. A transverse section made to intersect the corpora mammil-laria best demonstrates the main features of the reciprocalrelations of the central parts. (Fig. I.). W Lenticular Horn, of Amiiion Sphenoidal Horn oflat.Ventricla. Post, cerebral Arleriea Fig. I.—Vertico-transverse section of the brain, posterior to the tubercula mam-millaria ; anterior to the peduncles. Immediately above the protuberance you see the inferiorface of the crura cerebri, the inferior portions of which issuemainly from the anterior bulbs of the pyramids. From the lower up to the middle part of the section, you LOCALIZATION IN CEREBRAL DISEASES. 5 will see two large, white tracts which run divergingly towardsthe cortical portions of the hemispheres. They are betweentwo masses of gray substance, the one internal and superior, the other external and inferior. These two tracts are the pro-longations of the crura cerebri to the cerebral hemispheres. The crura cerebri, which are at first irregularly quadrilateral, become horizontally flattened as they enter the hemisphere

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