. Quain's elements of anatomy . that the two ends of the limbic lobe of Broca, which areseparated by the deep part of the Sylvian fissure, are indirectly united with oneanother by the roots of the olfactory tract, so that the olfactory lobe, of whichthis foiTHS a part, is in ultimate connection with the limbic lobe. This connec-tion is much more conspicuous in animals. EELATION OF THE CEREBRAL FISSURES AND CONVOLUTIONS TO THECRANIAL SUTURES. This relation was first determined exactly by Broca, and subsequentlyhas been more extensively mapped out by Turner and Hefftler. Brocainserted pins throu
. Quain's elements of anatomy . that the two ends of the limbic lobe of Broca, which areseparated by the deep part of the Sylvian fissure, are indirectly united with oneanother by the roots of the olfactory tract, so that the olfactory lobe, of whichthis foiTHS a part, is in ultimate connection with the limbic lobe. This connec-tion is much more conspicuous in animals. EELATION OF THE CEREBRAL FISSURES AND CONVOLUTIONS TO THECRANIAL SUTURES. This relation was first determined exactly by Broca, and subsequentlyhas been more extensively mapped out by Turner and Hefftler. Brocainserted pins through the cranium at particular points in the cranialsutures, and noted the situation of the chief fissures with reference tothe parts of the cerebral surface pierced by the pins. Turners methodconsisted in carefully removing successive portions or regions of thecranial wall, and dehneating upon the removed parts the fissures whichwere exposed by their removal. The most important facts which have been determined by these Fig. Fig. 299.—Outline sketch of the skull, with the position ov some of thePRINCIPAL cerebral SULCI MARKED UPON IT (from a drawing by G. D. Thane). ^ Sy, Sylvian fissure; S)/.a., , its anterior and posterior limbs ; , furrow ofRolando ; , transverse frontal furrow ; , intraparietal furrow; , positionof the parieto-occipital fissure; ^ parallel furrow; , middle temporo-sphenoidal furrow. 342 THE CEEEBEAL HEMISPHERES. methods refer to the Sylvian fissure, the parieto-occipital fissure, and thesulcus of Eolando. The Sylvian fissure.—The commencement of this nearly corre-sponds with the suture which unites the anterior inferior angle of theparietal bone with the great wing of the sphenoid. From this pointthe anterior limb passes up for a short distance nearly parallel with andclose to the coronal suture, whilst the posterior limb runs at first alongthe line of the squamous suture, but afterwards, as this arches down
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