A treatise on the diseases of the nervous system . orpus striatum. Thecandated nucleus and the optic thalamus are separated from the lentic-ular muscles by a lamina of white substance called the internal cap-sule, which by its expansion constitutes the corona racliata. These re-lations are clearly shown in the accompanying diagram of a verticalsection of the brain. Now if the fibres of the internal capsule be fol-lowed from above downward, it is seen that they come exclusivelyfrom the inferior portion of the peduncle. These fibres in reality formtwo very distinct fasciculi. The one, composed e
A treatise on the diseases of the nervous system . orpus striatum. Thecandated nucleus and the optic thalamus are separated from the lentic-ular muscles by a lamina of white substance called the internal cap-sule, which by its expansion constitutes the corona racliata. These re-lations are clearly shown in the accompanying diagram of a verticalsection of the brain. Now if the fibres of the internal capsule be fol-lowed from above downward, it is seen that they come exclusivelyfrom the inferior portion of the peduncle. These fibres in reality formtwo very distinct fasciculi. The one, composed exclusively of sensoryfibres, at the posterior and inferior part of the corona radiata, windsround the posterior extremity of the lenticular ganglion, and then turnsback to terminate, according to Meynert, in the occipital lobe. Thissensory fasciculus, after decussating at the posterior part of the pyra- SYMPTOMATOLOGY OF CEREBRAL LESIOXS. 363 mids, reaches, according to the same author, the posterior column ofthe spinal cord of the opposite Internal capsule, internal face. A, section of the protuberance ; B. cerebral peduncle, fibres of thepeduncle (passing directly into the optic thaamus); C. fibres from the optic thalamus going tothe extra-ventricular nucleus (lenticular ganglion) of the corpus striatum and to the internal cap-sule; D. postero-external fasciculus, which, starting from the peduncle, passes around the posteriorpart of the optic thalamus and joins it superiorly; E. fibres going from the optic thalamus to theextra-ventricular nucleus of the corpus striatum ; *F. ehiasma of the optic nerves ; G. intra-ventricularnucleus of the corpus striatum; I, optic thalamus; K, convolutions of the corpus callosum; L. tu-bercula quadrigemina. The other fasciculus, which constitutes the anterior two-thirds of theinternal capsule, consists entirely of motor fibres. These terminate inpart in the central ganglia. But the most recent researches demon-strate that the motor por
Size: 1777px × 1406px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectnervoussystem, bookye
