Cerebellar functions / Dr. Andre-Thomas.

Date:
1912
Catalogue details

Licence: Public Domain Mark

Credit: Cerebellar functions / Dr. Andre-Thomas. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    come within the scope of this work. It is only necessary to re- member that the cerebellum is divided by several deep fissures into lobes; these are divided by less pronounced fissures into lobules and these in their turn into lamellae. The fissures of the vermis are less deep than of the lateral hemispheres, nevertheless there is an apparent continuity between the lamellae of the cere- bellar hemispheres and those of the vermis, so that each lobe com- prised between two deep fissures may be considered as being formed of a vermian and two hemispheric parts. This concep- tion, however, is purely anatomical, for physiologically it seems preferable not to confound the hemispheres and the vermis. M. and Mme. Dejerine distinguish five primordial lobes in the cerebellum of man: (i) superior lobe or lobe of the principal mass of the vermis; (2) posterior lobe, or lobe of the transverse lobule; (3) inferior lobe or lobe of the pyramid; (4) infero-in- ternal lobe, or lobe of the uvula; (5) ihfero-anterior lobe or lobe of the nodule. Each of these lobes comprises a vermian and a hemispheric portion. The superior lobe is divided into four secondary lobes. The lobe of the lingula, central lobe, lobe of the culmen and lobe of the declive. The lobe of the lingula is represented in the vermis by the lingula and in the hemispheres by the frenulse of the lingula; in the same way the central lobe comprises the central lobule and the alae of the central lobule. The lobe of the culmen, the culmen and the anterior portion of the quadrilateral lobe; the lobe of the declive represents the declivus and the poste- rior portion of the quadrilateral lobe. The posterior lobe is subdivided into the superior lobe of the transverse lamellae (folium cacuminis in the vermis and superior semilunar lobe in the hemispheres), and the lobe of the inferior transverse lamellae (tuber valvulae in the vermis and the inferior semilunar lobe and the lobus gracilis in the hemispheres), the in- ferior lobe or lobe of the pyramid comprises the pyramid in the vermis and the digastric lobe in the hemispheres. The infero-internal lobe or the lobe of the uvula is formed by the uvula in the vermis, and the tonsils in the hemispheres. Finally the infero-anterior lobe or lobe of the nodule is represented in the vermis by the nodule and in the hemispheres by the flocculus.