Emissary veins
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| Vein: Emissary veins | |
|---|---|
| Latin | vena emissaria |
| Dorlands / Elsevier | v_05/12850208 |
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The emissary veins are valveless veins which normally drain the intracranial venous sinuses to veins on the outside of the skull. However, because they are valveless, blood 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 foramen of Vesalius 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.
See also
External links
- Emissary+vein at eMedicine Dictionary
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Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
