. A treatise on nervous and mental diseases, for students and practitioners of medicine. dle segments of the lenticular nucleus; whilstfrom the lateral portion of the Sylvian artery is supplied theouter segment of the lenticular nucleus, the middle ])ortion ofthe caudate nucleus, and the external capsule. The ganglia of thetegmental portion of the crus are supplied from the commencingportions of the large arteries forming the circle of Willis. Thechoroideal artery and the posterior communicating supply the ante- 70 INTRODUCTORY. rior, and the posterior cerebral the posterior ganglia. It must b
. A treatise on nervous and mental diseases, for students and practitioners of medicine. dle segments of the lenticular nucleus; whilstfrom the lateral portion of the Sylvian artery is supplied theouter segment of the lenticular nucleus, the middle ])ortion ofthe caudate nucleus, and the external capsule. The ganglia of thetegmental portion of the crus are supplied from the commencingportions of the large arteries forming the circle of Willis. Thechoroideal artery and the posterior communicating supply the ante- 70 INTRODUCTORY. rior, and the posterior cerebral the posterior ganglia. It must beborne in mind that although there are communications between theselarger arteries at the base, there are none between the branches afterthey have plunged into the cerebral substance, and that these latter,therefore, are terminal arteries. The optic chiasm, the cranial nerves,the pons, the medulla oblongata, are thus supplied directly fromthe arteries of the circle of Willis without any intervention of thearteries coming from the pia mater. Duret has shown, furthermore, Fig. 3 1. G DCtQQVCDrawing from Duret, showing arteries of the pons and the choroid plexus. 0. Part of optic thalamus not covered by choroid plexus. 0. Choroid plexus beneaththe optic thalamus. C. Posterior portion of choroid, thrown back from its normalposition above the crura cerebri and the quadrigeminal bodies. D. Choroid Its anterior portion. D. Where it curves to reach the lateral ventricles. geniculate body. G. External geniculate body. Q. Anterior quadrigeminalbody. Q. Posterior quadrigeminal body. P. Section of crura cerebri ju^t above thepons. Pi. Pineal gland. 1. Carotid artery. 2. Sylvian, or middle cerebral Anterior cerebral artery. 4. Posterior cerebral artery. 5. Point of origin, from thecarotid, of the anterior choroideal artery. 5. Its course in the choroid plexus. choroideal artery. 6. Its branch to the choroid plexus. 6. Its branchto the ve
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