Internal Jugular Vein | Anatomy Tutorial

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The internal jugular vein is a paired vein which is usually the largest vein in the neck. It begins as the direct continuation of the sigmoid sinus at the base of the skull below the jugular foramen and descends vertically downwards to end behind the sternal end of the clavicle by joining the subclavian vein to form the brachiocephalic vein.
The right branchicephalic vein unites with the left brachiocephalic vein to from the superior vena cava.
The internal jugular vein presents two dilatations; one is just inferior to the jugular foramen and is called the superior bulb, and the other dilatation, the inferior bulb, is just 1 cm above its termination. The superior bulb bulges in the inferior wall of middle ear.

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