Human anatomy, including structure and development and practical considerations . two entls, in front and behind, are pointed and connected by abroader intervening tract, which is commonly broken u\) by secondary temporal division of the gyrus, including its anterior two-thirds,is embraced between the converging collateral hssure mesially and the inferiortemporal sulcus laterally ; its conventional posterior limit is the line drawn fromthe preoccipital notch to the isthmus of the limbic lobe, immediately beneath thehind-end of the corpus callosum. The superior surfac
Human anatomy, including structure and development and practical considerations . two entls, in front and behind, are pointed and connected by abroader intervening tract, which is commonly broken u\) by secondary temporal division of the gyrus, including its anterior two-thirds,is embraced between the converging collateral hssure mesially and the inferiortemporal sulcus laterally ; its conventional posterior limit is the line drawn fromthe preoccipital notch to the isthmus of the limbic lobe, immediately beneath thehind-end of the corpus callosum. The superior surface of the temporal lobe is directed towards the insula andis therefore an opercular aspect. On separating the walls of the Sylvian fissure toexpose it, this buried surface of the temporal lobe often exhibits several shallowtransverse furrows and indistinct gyri ; the deep aspect of the temporal pole beingsimilarly indented. Fig. 991. Kolaudic fissure Sulcus subdividing preceutral lohult- // Cut surface of frontal lobe -Sulcus circularis Sulcus centralis Sulcus centralis insulse. Gyri breves Gyrus longus Temporal Apex Limenlobe, cut Island of Reil exposed after cutting away surrounding parts of right cerebral hemisphere. The Insula.—The insula, or island of Reil, sometimes also called the centrallobe, is, in the human brain, entirely concealed within the Sylvian fissure by theapproximation of the overhanging opercula. The manner in which the latter aredeveloped from the wall surrounding the early Sylvian fossa has been described(page 1137) ; it remains here to note the chief features of this region in the adultbrain. On examining the relations of the insula, as seen in frontal sections of thebrain (Fig. 967), it will be noted {a) that the shell of cortical gray matter cover-ing the sunken convolutions is directly continuous along the Sylvian fissure with thatcovering the convolutions on the freely exposed parts of the hemisphere ; (d^) thatthe insular cortex lies close to the u
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
