jugular bulbs (inferior/superior); Heister diverticulum

Introduction

Two dilated parts of the internal jugular vein (IJV).

Superior bulb (Heister diverticulum):

• a dilation at the begining of the IJV in the jugular fossa of the temporal bone

Inferior bulb:

• a dilated portion of the IJV just before it reaches the brachiocephalic vein

More general terms

• internal jugular vein