World Library  
Flag as Inappropriate
Email this Article

Jugular vein

Article Id: WHEBN0001283378
Reproduction Date:

Title: Jugular vein  
Author: World Heritage Encyclopedia
Language: English
Subject: Hickman line, Transjugular intrahepatic portosystemic shunt, Mike the Headless Chicken, Clint Malarchuk, Great cerebral vein
Collection: Veins of the Head and Neck
Publisher: World Heritage Encyclopedia

Jugular vein

Jugular vein
Frontal view of the veins of the neck
Drains to
superior vena cava
MeSH A07.231.908.498
Anatomical terminology

The jugular veins are veins that bring deoxygenated blood from the head back to the heart via the superior vena cava.


  • Structure 1
    • Internal 1.1
    • External 1.2
  • Clinical significance 2
    • Pressure 2.1
    • Idiom 2.2
  • See also 3
  • References 4


There are two sets of jugular veins: external and internal

The left and right external jugular veins drain into the subclavian veins. The internal jugular veins join with the subclavian veins more medially to form the brachiocephalic veins. Finally, the left and right brachiocephalic veins join to form the superior vena cava, which delivers deoxygenated blood to the right atrium of the heart.[1]


The internal jugular vein is formed by the anastomosis of blood from the sigmoid sinus of the dura mater and the common facial vein. The internal jugular runs with the common carotid artery and vagus nerve inside the carotid sheath. It provides venous drainage for the contents of the skull.


The external jugular vein runs superficially to sternocleidomastoid.

There is also another minor jugular vein, the anterior jugular vein, draining the submaxillary region.

Clinical significance


The jugular venous pressure (JV) is an indirectly observed pressure over the venous system. It can be useful in the differentiation of different forms of heart and lung disease.

The Jugular Venous Pressure Waveform

In the jugular veins Pressure Waveform, upward deflections correspond with (1) atrial contraction, (2) ventricular contraction (and resulting bulging of perspicuous into the right atrium during isovolumic systole), and (3) atrial venous filling. The downward deflections correspond with (1) the atrium relaxing (and the perspicuous valve moving downward) and (2) the filling of ventricle after the tricuspid opens.

The a peak is caused by the contraction of the right atrium.
The av minimum is due to relaxation of the right atrium and closure of the tricuspid valve.
The c peak reflects the pressure rise in the right ventricle early during systole and the resultant bulging of the tricuspid valve—which has just closed—into the right atrium.
The x minimum occurs as the ventricle contracts and shortens during the ejection phase, later in systole. The shortening heart—with tricuspid valve still closed—pulls on and therefore elongates the veins, lowering their pressure.
The v peak is related to filling of the right atrium against a closed tricuspid valve, which causes right atrial pressure to rise. As the tricuspid valve opens, the v peak begins to wane.
The y minimum reflects a fall in right atrial pressure during rapid ventricular filling, as blood leaves the right atrium through an open tricuspid valve and enters the right ventricle. The increase in venous pressure after the y minimum occurs as venous return continues in the face of reduced ventricular filling.


The jugular vein is the subject of a popular idiom in the English language, deriving from its status as the vein most vulnerable to attack. The phrase 'to go for the jugular', means to attack decisively at the weakest point - in other words, to attack at the opportune juncture for a definitive resolution, or coup-de-grace.

See also


  1. ^ Jugular vein definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.