. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. THE BRAIN. 537 pass fibers that spread out toward the cortex, a,s the corona radiata. i. Fig. 888.—Transverse section of cerebral hemispheres, at level of cerebral ganelia (after Dalton). 1, great longitudinal fissure ; 2, part of same between occipital lobes ; 3, anterior part of corpus callosum ; 4, Assure of Sylvius ; 5, convolutions of island of Keil (insulai; 6, caudate nucleus of corpus striatum ; 7, lenticular nucleus of corpus striatum ; 8,
. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. THE BRAIN. 537 pass fibers that spread out toward the cortex, a,s the corona radiata. i. Fig. 888.—Transverse section of cerebral hemispheres, at level of cerebral ganelia (after Dalton). 1, great longitudinal fissure ; 2, part of same between occipital lobes ; 3, anterior part of corpus callosum ; 4, Assure of Sylvius ; 5, convolutions of island of Keil (insulai; 6, caudate nucleus of corpus striatum ; 7, lenticular nucleus of corpus striatum ; 8, optic thalamus ; 9, internal capsule ; 10, external capsule ; 11, claustrum. Pathology, especially, has shown that a lesion of the intra- ventricular portion of the corpus striatum, and, above all, of the internal capsule, is followed by failure of voluutai^y move- ment (akinesia). It would appear that a great part of the fibers from the motor area around the fissure of Rolando, pass through the intra-ventricular parts of the corpus striatum, and especially its internal capsule. But it is also to be borne in mind that a large part of the fibers passing from the cortex make connection with the cells of the corpus striatuhi before reaching the cord. These facts render the occurrence of loss of voluntary motor power comprehensible. The fibers of the peduncles of the brain may be divided into. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mills, Wesley, 1847-1915. New York, D. Appleton
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