File:Anatomy, descriptive and surgical (electronic resource) (1860) (14764478532).jpg

Identifier: b20386424 (find matches)
Title: Anatomy, descriptive and surgical (electronic resource)
Year: 1860 (1860s)
Authors: Gray, Henry, 1825-1861 Carter, H. V., ill Westmacott, John Guise, Dr, ill
Subjects: Anatomy
Publisher: London : J.W. Parker
Contributing Library: Wellcome Library
Digitizing Sponsor: Wellcome Library

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al plexus of nerves lies above the artery,and in close contact with it. Passing transversely across the clavicular marginof the space, are the supra-scapular vessels; and traversing its upper angle in thesame direction, the transverse cervical vessels. The external jugular vein descendsvertically downwards behind the posterior border of the Sterno-mastoid, to terminate INTERNAL CAROTID. 353 in the Subclavian; it receives the transverse cervical and supra-scapular veins,which occasionally form a plexus in front of the artery, and a small vein whichcrosses the clavicle from the cephalic. The small nerve to the Subclavius alsocrosses this space about its centre. Internal Carotid Artery. The internal carotid artery commences at the bifurcation of the common carotid,opposite the upper border of the thyroid cartilage, and ascends perpendicularlyupwards, in front of the transverse processes of the three upper cervical vertebrce, 212,—The Internal Carotid and Vertebral Arteries. Right Side.
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A A 354 ARTERIES. to the carotid foramen in tlie petrous portion of the temporal bone. After ascend-ing in it for a short distance, it passes forwards and inwards through the carotidcanal, and, ascending a little by the side of the sella Turcica, curves upwards bythe anterior clinoid process, where it pierces the dura mater, and divides into itsterminal branches. This vessel supplies the anterior part of the brain, the eye, and its appendages.Its size, in the adult, is equal to that of the external carotid. In the child, it islarger than that vessel. It is remarkable for the number of curvatures that itpresents in different parts of its course. In its cervical portion it occasionally pre-sents one or two flexures near the base of the skull, whilst through the rest of itsextent it describes a double curvature, which resembles the italic letter f placedhorizontally oo. These curvatures most probably diminish the velocity of thecurrent of blood, by increasing the extent of surface over w

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