Diseases of the nervous system .. . 64 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM Here they take part in that projection fiber sysfeni which passes from allsides of the cerebral cortex to each hemisphere, just as the so-called fibrilla-. FiG. 59.—A Partly Diagrammatic Presentation of the Cortex of the Cerebrum After Staining with Silver. /, Molecular layer; II, small pyramidal colls; ///, large pyramidal cells; IV, polymorphic cellswith medullary layer. (After Obersteiner.) tion of the corona radiata passes to the caudally situated areas of the brain(Figs. 61 and 62). While a large portion of the
Diseases of the nervous system .. . 64 HISTOLOGY OF THE CENTRAL NERVOUS SYSTEM Here they take part in that projection fiber sysfeni which passes from allsides of the cerebral cortex to each hemisphere, just as the so-called fibrilla-. FiG. 59.—A Partly Diagrammatic Presentation of the Cortex of the Cerebrum After Staining with Silver. /, Molecular layer; II, small pyramidal colls; ///, large pyramidal cells; IV, polymorphic cellswith medullary layer. (After Obersteiner.) tion of the corona radiata passes to the caudally situated areas of the brain(Figs. 61 and 62). While a large portion of these tibers pass to the root ganglion (corpus striatum) or to the inter-hrain (thalamus opticus), the nerve fibers ofthose pyramidal cells in the deeper parts ofthe medullary layer of the hemispheres forma distinct bundle, the motor or pyramidaltract (Fig. 61). At the level of the corpusstriatum this enters into the medullary layerof the same called the internal capsule, whichdivides the corpus striatum into the caudatenucleus and the lenticular nucleus, and showsupon horizontal section an obtuse angularbend, w^hich opens outwardly (Figs. 51, 55).Therefore, upon horizontal section the inter-nal capsule reveals an anterior and
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