. Medical and surgical therapy . be onthe opposite side by the falxcerebri, and consists entirelyof the triangular sixth occi-pital convolution, the cuneus ;its summit is anterior; thesuperior border is marked bythe parieto-oceipital or internalperpendicular fissure, and theinferior border by the calcarinefissure. This extremely deepfissure is situated at the lowestpart of the internal aspect ofthe occipital lobe, and extendsupwards and forwards fromthe point of that lobe towards the hinder end of thecorpus callosum. The white matter of the occipital lobe is traversedby the bundle of fibres wh
. Medical and surgical therapy . be onthe opposite side by the falxcerebri, and consists entirelyof the triangular sixth occi-pital convolution, the cuneus ;its summit is anterior; thesuperior border is marked bythe parieto-oceipital or internalperpendicular fissure, and theinferior border by the calcarinefissure. This extremely deepfissure is situated at the lowestpart of the internal aspect ofthe occipital lobe, and extendsupwards and forwards fromthe point of that lobe towards the hinder end of thecorpus callosum. The white matter of the occipital lobe is traversedby the bundle of fibres which form Gratiolets opticradiations, the lowest and most external portion ofwhich forms the inferior longitudinal fasciculus. Thisfasciculus extends from the corpus geniculatum exter-num to the internal aspect of the occipital lobe, andpassing above the horn of the lateral ventricle isspread out round the calcarine fissiue, and is knownas the intra-ccre])ral optic fasciculus. Localisation of the visual area.—While some authors. Fig. 18.—Vertico-transvcrsalsection of the occipital lobebehind the point of theventricle. c, calcarinefissure. The dotted lineshows the extent of thearea striata. WOUNDS OF THE OCCIPITAL LOHE 681 attribute to the visual centre an area covering thewhole of the cortex of the occipital lobe, includingits external aspect, others confine the function ofvision exclusively to the internal aspect of the lobe,and especially to the cortex of the calcarine fissure, Visual field. Optic tract. Geniculateganglion. radiation. Calcarine fissure.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsurgery, bookyear1918
