Sigmoid sinus

The sigmoid sinuses (sigma- or s-shaped hollow curve), also known as the pars sigmoid, are venous sinuses within the skull that receive blood from posterior dural venous sinus veins.

Sigmoid sinus
Dural veins. ("Pars sigmoid" labeled at lower right.)
Sourcetransverse sinus
Drains tointernal jugular vein
LatinSinus sigmoideus
Anatomical terminology


The sigmoid sinus is a dural venous sinus situated within the dura mater. The sigmoid sinus receives blood from the transverse sinuses, which track the posterior wall of the cranial cavity, travels inferiorly along the parietal bone, temporal bone and occipital bone, and converges with the inferior petrosal sinuses to form the internal jugular vein.[1] :795–6

Each sigmoid sinus begins beneath the temporal bone and follows a tortuous course to the jugular foramen, at which point the sinus becomes continuous with the internal jugular vein.


The sigmoid sinus receives blood from the transverse sinuses, which receive blood from the posterior aspect of the skull. Along its course, the sigmoid sinus also receives blood from the cerebral veins, cerebellar veins, diploic veins, and emissary veins.[1] :795

See also


  1. Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students (Pbk. ed.). Philadelphia: Elsevier/Churchill Livingstone. ISBN 978-0-443-06612-2.
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