. Cunningham's Text-book of anatomy. Anatomy. 902 THE VASCULAE SYSTEM. sinus, in relation with the oculomotor, trochlear, the ophthalmic division of the trigeminal, and the abducens nerves laterally, and with the endothelial wall of the sinus medially. When it reaches the lower root of the small wing of the sphenoid it turns upwards to the medial side of the anterior clinoid process, pierces the inner layer of the dura mater, and comes into close relation with the inferior surface of the optic nerve immediately posterior to the optic foramen. It then turns abruptly backwards below the optic ne
. Cunningham's Text-book of anatomy. Anatomy. 902 THE VASCULAE SYSTEM. sinus, in relation with the oculomotor, trochlear, the ophthalmic division of the trigeminal, and the abducens nerves laterally, and with the endothelial wall of the sinus medially. When it reaches the lower root of the small wing of the sphenoid it turns upwards to the medial side of the anterior clinoid process, pierces the inner layer of the dura mater, and comes into close relation with the inferior surface of the optic nerve immediately posterior to the optic foramen. It then turns abruptly backwards below the optic nerve, and on the medial side of the anterior clinoid process which it frequently grooves; inclining laterally, it runs between the optic and oculo-motor nerves, and below the anterior perforated substance, to the medial end of the stem of the lateral fissure (Sylvius), where it turns upwards, at some distance from the lateral side of the optic chiasma, and, after piercing the arachnoid, divides into its two terminal branches, the anterior and middle cerebral arteries. Branches of the Internal Carotid Artery. Branches are given off from the internal carotid in the temporal bone and in the cranium, but, as a rule, no regular branches are given off in the neck. In the Temporal Bone.—(1) A caroticotympanic branch, very small, perforates the posterior wall of the carotid canal, and anastomoses in the tympanum with the stylo-mastoid artery and with the tympanic branches of the internal maxillary and ascending pharyngeal arteries. (2) A small and inconstant branch which accompanies the nerve of the pterygoid canal (Vidian); it anastomoses with a branch of the descending palatine artery. In the Cranium.—(1) Cavernous, small branches to the walls of the cavernous sinus and to the third, fourth, fifth, and sixth cerebral nerves. (2) Minute twigs which supply the semilunar ganglion. (3) Hypophyseal branches pass to the hypophysis ( pituitary body). (4) Meningeal branches ramify in
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
