Petrous portion of the internal carotid artery
- Petrous portion of the internal carotid artery
Infobox Artery
Name = Petrous portion of the internal carotid artery
Latin = pars petrosa arteriae carotidis internae
GraySubject = 146
GrayPage = 567
Caption = Auditory tube, laid open by a cut in its long axis.
Caption2 =
BranchFrom = internal carotid artery
BranchTo = caroticotympanic arteries, vidian artery
Vein =
Supplies =
MeshName =
MeshNumber =
DorlandsPre = p_07
DorlandsSuf = 12617502
Petrous portion of the internal carotid artery (or petrous segment).—When the internal carotid artery enters the canal in the petrous portion of the temporal bone, it first ascends a short distance, then curves forward and medialward, and again ascends as it leaves the canal to enter the cavity of the skull between the lingula and petrosal process of the sphenoid.
The artery lies at first in front of the cochlea and tympanic cavity; from the latter cavity it is separated by a thin, bony lamella, which is cribriform in the young subject, and often partly absorbed in old age.
Farther forward it is separated from the semilunar ganglion by a thin plate of bone, which forms the floor of the fossa for the ganglion and the roof of the horizontal portion of the canal.
Frequently this bony plate is more or less deficient, and then the ganglion is separated from the artery by fibrous membrane.
The artery is separated from the bony wall of the carotid canal by a prolongation of dura mater, and is surrounded by a number of small veins and by filaments of the carotid plexus, derived from the ascending branch of the superior cervical ganglion of the sympathetic trunk.
External links
*
*
Wikimedia Foundation.
2010.
Look at other dictionaries:
Internal carotid artery — Infobox Artery Name = Internal carotid artery Latin = arteria carotis interna GraySubject = 146 GrayPage = 566 Width = 250 Caption = Arteries of the neck. The internal carotid arteries arise from the common carotid arteries labeled Common caroti… … Wikipedia
Petrous portion — can refer to: * Petrous portion of the temporal bone * Petrous portion of the internal carotid artery … Wikipedia
Cervical part of internal carotid artery — Artery: Cervical portion Latin pars cervicalis arteriae carotidis internae Gray s subject #146 567 The Cervical portion (or cervical segment) of the internal carotid begins at the bifurcation of the common carotid, opposite the upper border of… … Wikipedia
Cerebral portion of internal carotid artery — Artery: Cerebral portion of internal carotid artery Outer surface of cerebral hemisphere, showing areas supplied by cerebral arteries … Wikipedia
Petrous part of the temporal bone — Infobox Bone Name = Petrous portion of the temporal bone Latin = pars petrosa ossis temporalis GraySubject = 34 GrayPage = 142 Caption = Left temporal bone. Outer surface. Caption2 = Diagrammatic view of the fundus of the right internal acoustic… … Wikipedia
Artery — A vessel that carries blood that is high in oxygen content away from the heart to the farthest reaches of the body. Since blood in arteries is usually full of oxygen, the hemoglobin in the red blood cells is oxygenated. The resultant form of… … Medical dictionary
Middle cerebral artery — Artery: Middle cerebral artery Outer surface of cerebral hemisphere, showing areas supplied by cerebral arteries. (Pink is region supplied by middle cerebral artery.) … Wikipedia
Occipital artery — Artery: Occipital artery The arteries of the face and scalp. (Occipital visible at center left.) … Wikipedia
Maxillary artery — Artery: Maxillary artery Plan of branches of maxillary artery. ( Internal maxillary is horizonal at left center.) … Wikipedia
Posterior cerebral artery — Artery: Posterior cerebral artery Outer surface of cerebral hemisphere, showing areas supplied by cerebral arteries. (Yellow is region supplied by posterior cerebral artery.) … Wikipedia
