The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . by the two callosumy restiform bodies which form its inferiorpeduncles, and above with the corporaquadrigemina of the cerebrum by twobands, which form its superior pe-duncles; whilst the two hemispheresare connected together bj^ the trans-verse fibres of the pons, which form themiddle peduncles of the cerebellum. Onthe superior or tentorial surface of thecerebellum the median or vermiformlobe is a mere elevation, but on itsinferior or occipital surface this lobeforms a well-defined process, which l
The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . by the two callosumy restiform bodies which form its inferiorpeduncles, and above with the corporaquadrigemina of the cerebrum by twobands, which form its superior pe-duncles; whilst the two hemispheresare connected together bj^ the trans-verse fibres of the pons, which form themiddle peduncles of the cerebellum. Onthe superior or tentorial surface of thecerebellum the median or vermiformlobe is a mere elevation, but on itsinferior or occipital surface this lobeforms a well-defined process, which liesat the bottom of a deep fossa or val-lecula; this fossa is prolonged to the posterior border of the cerebellum, „„.,„,..,.,and forms there a deep notch which From Cumimgham, r«(-6<.»J ./^w-^^^y. separates the two hemispheres from Fig. 6.—Mesial Section through the Corpus Callosum, the Mesencephalon, the Pons, Medulla andeach other; in this notch the falx Cerebellum. Showing the third and fourth ventricles joined by the aqueduct of Sylvius, cerebelli is lodged. Extending hori-. Anterior commissure Corpus mammillareLamina cinerea Optic nervei iliumcuminis aberIvulae Pituitary body \ j Tuber cinereum i ^ , Third nerve 1 i Pons I Valve of Vieussens Ventricle IV. Medulli Choroid plexus in ventricle IV. zontally backwards from the middle cerebellar peduncle, along theouter border of each hemisphere is the great horizontal flssure, whichdivides the hemisphere into its tentorial and occipital of these surfaces is again subdivided by fissures into smaller grey matter of the corpus dentatum. The superior peduncles, whichdescend from the corpora quadrigemina of the cerebrum, formconnexions mainly with the corpus dentatum. The middle pedunclesform a large proportion of the white core, and their fibres terminate ANATOMY] BRAIN 395 in the grey matter of the foliated. cortex of the hemispheres. Ithas been noticed that those fibres which are lowest in the pons got
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
