. A treatise on practical anatomy: for students of anatomy and surgery . canalsin the diploic substance of the cranial bones. The veinsin these canals adhere to the walls and remain open onsection. The sinuses of the dura mater are a simpleseparation of the layers of the dura mater, and are linedby endothelium. They are:— Superior Longitudinal.—Begins at the foramencaecum, in front of the cristi galli. It runs along, themedian line of the skull to the internal occipital pro-tuberance, where it divides into the tw o lateral; thepoint of division is called the torcular Herophili. Inferior Loiigi
. A treatise on practical anatomy: for students of anatomy and surgery . canalsin the diploic substance of the cranial bones. The veinsin these canals adhere to the walls and remain open onsection. The sinuses of the dura mater are a simpleseparation of the layers of the dura mater, and are linedby endothelium. They are:— Superior Longitudinal.—Begins at the foramencaecum, in front of the cristi galli. It runs along, themedian line of the skull to the internal occipital pro-tuberance, where it divides into the tw o lateral; thepoint of division is called the torcular Herophili. Inferior Loiigitudinal.—Along the free border of thefalx cerebri; terminates posteriorly in the straight sinus. Straight.—Is the continuation backward of the 17 258 PRACTICAL ANATOMY. inferior longitudinal along the median line of the uppersurface of the tentorium cerebelli; it empties into thesuperior longitudinal. Lateral.—Formed by the division of the superiorlongitudinal. Pass horizontally outward on the horizontalgrooves of the occipital cross, then curve down behind. FiG. Ill —Diagram showing the Ceeebkal Sinuses in Profile. 1, superior longitudinal sinus; 2. inferior longitudinal sinus ; 3, straight sinus, deriv-ing blood from 1 and also from the veins of Galen (II); Nos. 1, 2. and 3 bound the falxcerebri ; 4, the torcular Hernphili, where four sinuses meet; 5, lateral sinus; fi, superiorpetrosal sinus, joining the lateral sinus (.i) with the cavernous sinus (8); 7, inferior petro-sal sinus, joining the eavet-imus sinus (S) with the jugular vein (9); 8, cavernous sinus;9, internal jugular vein formed by two sinuses (o and 7); lU, occipital sinus; 11, venaeGaleni; 12, vein passing to nasal cavity; 13, foramen otecain. the petrous bone, and terminate at the posterior laceratedforamina. OccipitO:!.—Two small sinuses from the sides of theforamen magnum; they empty into the lateral sinusesnear the point of their communication with the superiorlongitudinal. Cavernous.—Consist
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomy, bookyear1891
