Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . distinction.We have already said that the symptoms differ remarkablyaccording to the portion of the internal capsule affected bythe lesion. If it occupies any part of the anterior two-thirds of thecapsule, the region where the white tract separates the ante-rior extremity of the lenticular ganglion from the head of thecaudated ganglion, and which belong, as you know, to thefield of the lenticulo-striated artery, h& paralysis will be ex-clusively that oi motion ; there will be no durable tr

Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . distinction.We have already said that the symptoms differ remarkablyaccording to the portion of the internal capsule affected bythe lesion. If it occupies any part of the anterior two-thirds of thecapsule, the region where the white tract separates the ante-rior extremity of the lenticular ganglion from the head of thecaudated ganglion, and which belong, as you know, to thefield of the lenticulo-striated artery, h& paralysis will be ex-clusively that oi motion ; there will be no durable tr Stock Photo
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Lectures on localization in diseases of the brain, delivered at the Faculté de médecine, Paris, 1875 . distinction.We have already said that the symptoms differ remarkablyaccording to the portion of the internal capsule affected bythe lesion. If it occupies any part of the anterior two-thirds of thecapsule, the region where the white tract separates the ante-rior extremity of the lenticular ganglion from the head of thecaudated ganglion, and which belong, as you know, to thefield of the lenticulo-striated artery, h& paralysis will be ex-clusively that oi motion ; there will be no durable trouble ofsensation. CENTRAL ARTERIES. 79 On the contrary, if the lesion having invaded the domainof the lenticulo-optic arteries should extend vto the posteriorthird of the capsule, in that region where it passes betweenthe posterior extremity of the lenticular ganglion and thethalamus opticus, the presence of cerebral hemiansesthesiawould be almost certain. Most frequently the lesion extends pQ sterior eftremily, o£caudate3jiudeus Corpus CaIloEuni, aiidposl.pillar^ ofUieArdi. [.aleralVeiitride.. Isle y^ Extl.Vall.. HomofAminoriiand sphenoidal s^, »{horn of lat.Tentridev- , ^entre.(Upp%.portion incramnginternal capsulejr External Capsule.vLenticuIar Nucleus. Fig. 23.—Extra-lenticular Iiemorrlaagic centre on a plane witli tiie posterior portion of tile thalamus opticus. (Cerebral hemianesthesia, ) to several parts, and paralysis of sensation will be accom-panied with a more or less marked motor hemiplegia. But itmay happen that cerebral hemianassthesia will occur alone, atleast as a permanent phenomenon, in those cases, for example, where the most distant parts, the most posterior portion ofthe internal capsule would alone be definitely altered (Fig. 23). In the preceding expos^ I have purposely alluded onlyto truly destructive lesions of the internal capsule, to thosewhich, either by lacerations or necrosis, produce an irrepa-rable loss of substance. It is necessary, however, t

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