Diseases of the nervous system .. . l cord. The vermisof the cerebellum is divided into lobes by furrows; the most important whichlie dorsally upon the upper vermis, and extend from before backward, are thelingula, the central lobe, and the monticulus, and upon the lower vermis thenodulus, uvula, pyramis and the tuber vermis. The hemispheres of the cere-bellum show above, dorsally, and anteriorly a quadrangular lohe at the sideof the monticulus, and posteriorly the lohulus semilunaris superior; below,besides the nodulus, is the flocculus, upon the uvula the tonsilla, laterally fromthis the cun
Diseases of the nervous system .. . l cord. The vermisof the cerebellum is divided into lobes by furrows; the most important whichlie dorsally upon the upper vermis, and extend from before backward, are thelingula, the central lobe, and the monticulus, and upon the lower vermis thenodulus, uvula, pyramis and the tuber vermis. The hemispheres of the cere-bellum show above, dorsally, and anteriorly a quadrangular lohe at the sideof the monticulus, and posteriorly the lohulus semilunaris superior; below,besides the nodulus, is the flocculus, upon the uvula the tonsilla, laterally fromthis the cuneiform lohe, to which the inferior posterior lobe is posteriorlyjoined. The vermis and hemispheres possess a medullary nucleus; in itsinterior, particularly in the vermis, gray nuclei are found, also the corpusdendatum at the boundary of the vermis and hemispheres, and medially fromthis the embolus, the nucleus glohosus, and the tegmental nucleus. From thecerebellum over the fourth ventricle to the corpora quadrigemina passes ante-. FiG. 15.—The Cerebellum from the Ventral Side. (After Edinger.) riorly the velum medullare anticum, posteriorly the velum medullare posticum,and these extend to the posterior columns of the spinal cord. The plexuschorioidei, situated in the region of the ventricles, and which also passes intothe sinuses of the fourth ventricle and into open spaces the largest of whichis the foramen of Magendie, permits communication with the arachnoid space;this is of importance in equalizing variations of pressure. The manifoldcommunications of the cerebellum with most of the other structures of thecentral- nervous system by means of the hrachium conjunctivum cannot herebe mentioned; they have become known only by minute comparative anatom- MACROSCOPIC ANATOMY OF THE CENTRAL NERVOUS SYSTEM 23 ical investigations in degeneration. It is certain that the cerebellum is indi-rectly connected with the cortex of the cerebrum by the pontal arms, to thebrachium conjunctiv
Size: 2078px × 1202px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpu, booksubjectnervoussystem
