Vein: Emissary veins Latin vena emissaria
The emissary veins are valveless veins which normally drain external veins of the skull into the dural venous sinuses. However, because they are valveless, pus can flow into the skull through them as well, making them a possible route for transmission of extracranial infection to get into the skull.
One important emissary vein communicates from outside the skull through the sphenoidal emissary foramen inferior to the zygomatic arch with the cavernous sinus on the inside of the skull. This is an important route for spread of infection because cranial nerves III, IV, V1, V2, and VI and the internal carotid pass through the cavernous sinus. Subsequent infection or inflammation in the cavernous sinus can result in damage to any of the cranial nerves that pass through it or meningitis. Also, rupturing the emissary veins will result in a subdural hematoma which will compress the brain.
There are also emissary veins passing through the Foramen Ovale,Jugular Foramen,Foramen Lacerum and Hypoglossal canal.
Circulatory system: Arteries and veins (TA A12.0, TH H3.09.02, GA 6.543/GA 7.641) Systemic circulation Pulmonary circulation Blood vessels Arteries Veins Lymphatic Veins (emissary, jugular and others) of head and neck (drainage patterns can vary) (TA A12.3.04–06, GA 7.644) External jugularDirect Internal jugularTo COSTo CSTo IJVDirect BrachiocephalicDirect
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emissary veins — a group of veins within the skull that drain blood from the venous sinuses of the dura mater to veins outside the skull … Medical dictionary
emissary veins — a group of veins within the skull that drain blood from the venous sinuses of the dura mater to veins outside the skull … The new mediacal dictionary
Вены Эмиссарные (Emissary Veins) — венозные анастомозы между венозными синусами твердой мозговой оболочки и наружными венами головы. Источник: Медицинский словарь … Медицинские термины
Emissary — may refer to: * Ambassador * Diplomat * The Subspace Emissary in Super Smash Bros. Brawl * Emissaries (album), an album by black metal group Melechesh * Emissary (hydraulics), channel by which an outlet is formed to carry off any stagnant body of … Wikipedia
Emissary — Em is*sa*ry, a. 1. Exploring; spying. B. Jonson. [1913 Webster] 2. (Anat.) Applied to the veins which pass out of the cranium through apertures in its walls. [1913 Webster] … The Collaborative International Dictionary of English
emissary — /em euh ser ee/, n., pl. emissaries, adj. n. 1. a representative sent on a mission or errand: emissaries to negotiate a peace. 2. an agent sent on a mission of a secret nature, as a spy. 3. Anat. sending or coming out, as certain veins that pass… … Universalium
emissary vein — em·is·sary vein em ə .ser ē n any of the veins that pass through apertures in the skull and connect the venous sinuses of the dura mater with veins external to the skull * * * vena emissaria … Medical dictionary
emissary vein — noun one of several connecting veins in the scalp and head that drain blood from sinuses in the dura mater to veins outside the skull • Syn: ↑vena emissaria • Hypernyms: ↑vein, ↑vena, ↑venous blood vessel … Useful english dictionary
Sphenoidal emissary foramen — Infobox Bone Name = Sphenoidal emissary foramen Latin = Foramen venosum GraySubject = 35 GrayPage = 150 Caption = Sphenoid bone. Upper surface. (Sphenoidal emissary foramen labeled at left, fourth from bottom.) Caption2 = Base of the skull. Upper … Wikipedia
Occipital emissary vein — Vein: Occipital emissary vein Latin vena emissaria occipitalis Drains to occipital vein The occipital emissary vein is a small emissary vein which passes through the condylar canal. This article was originally based on an entry from a public… … Wikipedia