The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . rsely across the mesial plane between the two hemispheres; thesefibres may be traced into the white cores and grey matter of thegyri, and connect the gyri, though by no means always correspondingones, in the opposite hemispheres. Hence the corpus callosum is a con-necting or commissural structure, which brings the gyri of the twohemispheres into anatomical and physiological relation with eachother. On the surface of the corpus callosum a few fibres, the striaelongitudinales, run in the antero-poste
The encyclopdia britannica; a dictionary of arts, sciences, literature and general information . rsely across the mesial plane between the two hemispheres; thesefibres may be traced into the white cores and grey matter of thegyri, and connect the gyri, though by no means always correspondingones, in the opposite hemispheres. Hence the corpus callosum is a con-necting or commissural structure, which brings the gyri of the twohemispheres into anatomical and physiological relation with eachother. On the surface of the corpus callosum a few fibres, the striaelongitudinales, run in the antero-posterior or longitudinal direction(see fig. 12, 6); Their morphological interest is referred to in thesection below on Comparative Anatomy. In the sulcus between thecorpus callosum and the limbic lobe a narrow band of fibres calledthe cingulum is seen, most of its fibres only run a short distance init and link together adjacent parts of the brain. If the corpuscallosum be now cut through on each side of its mesial line, the largecavity or lateral ventricle in each hemisphere will be opened 398 BRAIN [ANATOMY the descending cornu curves backward, outward, downward, forwardand inward, behind and below the optic thalamus into the temporo-sphenoidal lobe. On the floor of the central space may be seenfrom before backward the grey upper surface of the pear-shapedcaudate nucleus of the corpus striatum (figs. 12 and 13, f), and to itsinner and posterior part a small portion of the optic thalamus, whilstbetween the two is the curved flat band, the taenia semicircularis(figs. 12 and 13, g). Resting on the upper surface of the thalamus Fig.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectencyclo, bookyear1910
