Human anatomy, including structure and development and practical considerations . ed limit of the parieto-occipital sulcusabove to the preoccipital notch below. On the inferior or tentorial aspect its demar-cation is even more uncertain, the occipital, limbic and temporal lobes being here 1146 HUMAN ANATOMY. directly continuous, and dcpciuls upon the recoL^nition of an arbitrary line whichmay be drawn, as suggested by Cunningham, from the ])reoccipital notch on theinfero-lateral border to the isthmus of the limbic lobe, just below the sj)lenium ofthe corpus callosuni. The external surface of t
Human anatomy, including structure and development and practical considerations . ed limit of the parieto-occipital sulcusabove to the preoccipital notch below. On the inferior or tentorial aspect its demar-cation is even more uncertain, the occipital, limbic and temporal lobes being here 1146 HUMAN ANATOMY. directly continuous, and dcpciuls upon the recoL^nition of an arbitrary line whichmay be drawn, as suggested by Cunningham, from the ])reoccipital notch on theinfero-lateral border to the isthmus of the limbic lobe, just below the sj)lenium ofthe corpus callosuni. The external surface of the occipital lobe is modelled by two well-defined fissures,the transverse occipital and the lateral occipital, and by two somewhat uncertainconvolutions, the superior and the inferior occipital (Fig. 988j. The transverse occipital sulcus is, as al)ove ])ointed out, the widely di\er-gent terminal bifurcation of the interparietal fissure, whose last segment bevond theouter end of the parieto-occipital sulcus enters the occipital lobe to end in the mannerjust indicated. Fig. Inferior aspect of cerebral hemispheres, , , , internal, transverse and external orbital fissures; incisura temporalis; cal., calcarine , co/., collateral;«-/., occipito-temporal fissures. The lateral occipital sulcus arches horizontally forward below the lower endof the preceding furrow, not infrecjuently di\iding into an ascending and a descending-limb. The superior and inferior occipital gyri are the upper and lower areas intowhich the outer aspect of the occijiital lobe is somewhat uncertainly subdivided bythe lateral occipital sulcus. Secondary furrows and ridges often obscure the charac-teristic modelling of this surface, whilst annectant convolutions connect its gyri withthe parietal and temporal lobes. The mesial surface of the occipital lobe presents one sulcus, the calcarine fissure,a triangular tract, the cuneus, and part of the gyrus lingualis. The calcarine fissure begins b
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
