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    Dr. Supreet Singh Nayyar, AFMC 2012

    www.nayyarENT.com 1

    The Dural Venous Sinuses for more topics, visitwww.nayyarENT.com

    The dural venous sinuses are spaces between the endosteal and meningeal layers of thedura.

    The sinuses contain an endothelial lining that is continuous into the veins that are connectedto them.

    There are no valves in the sinuses or in the veins that are connected to the sinuses. Thesuperior sagittal sinus is found in the upper border of the falx cerebri and begins at the

    crista galli. The superior sagittal sinus is fed by blood from the superior cerebrals vein and

    ends at the confluence of sinuses near the internal occipital protuberance.

    Theinferior sagittal sinusis located in the lower free border of the falx cerebri between thetwo cerebral hemispheres. It begins anteriorly and ends with its junction with straight sinus.

    Thestraight sinus originates with the union of the great cerebral vein and inferior sagittalsinus. It runs posteriorly in the junction between the falx cerebelli and tentorium cerebelli to

    become continuous with one of the transverse sinuses (most commonly the left).

    Thecavernous sinuses are found on either side of the body of the sphenoid bone in middlecranial fossae. They receive blood from the sphenoparietal sinuses which are located

    underneath the free edges of the lesser wings of the sphenoid bone. Blood also drains into

    the cavernous sinuses via the superior and inferior ophthalmic veins. The intercavernous

    sinuses provide a communication between the cavernous sinuses. They are located in the

    diaphragma sellae which covers the hypophyseal fossa and surrounds the hypophyseal stalk.

    The internal carotid artery, sympathetic nerve plexus and the abducens nerve are inside the

    cavernous sinuses. In the wall of the cavernous sinuses are the oculomotor, trochlear,

    ophthalmic and maxillary nerves. The cavernous sinuses drain posteriorly through the

    superior and inferior petrosal sinuses and inferiorly through the pterygoid plexus of veins.

    Thesuperior petrosal sinuses are located in the edge of the tentorium cerebelli on the ridgeof petrous part of the temporal bone. They drains into the transverse sinuses.

    Theinferior petrosal sinusesare found at the base of the petrous part of the temporal bonein the posterior cranial fossae where they empty into the internal jugular vein. The basilar

    sinus interconnects with inferior petrosal sinuses and the internal vertebral plexus.

    Thetransverse sinuses extend laterally from the confluence of sinuses in the tentoriumcerebelli. The transverse sinuses travel ventrally to become the sigmoid sinuses of each side.

    Thesigmoid sinusesbend into an S-shaped curve and continue into the internal jugular veinthrough the jugular foramen.

    The occipital sinus is located in the posterior attached border of the falx cerebelli. Itcommunicates superiorly with confluence of sinuses and inferiorly with the internal

    vertebral plexus.

    http://www.nayyarent.com/http://www.nayyarent.com/http://www.nayyarent.com/http://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs3.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs3.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs1.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs3.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.meddean.luc.edu/lumen/MedEd/grossanatomy/h_n/cn/dvs/dvs2.htmhttp://www.nayyarent.com/

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    Dr. Supreet Singh Nayyar, AFMC 2012

    www.nayyarENT.com 2

    Dural Venous Sinuses.

    View is with the skull cap removed and the

    cranial cavity exposed.

    A. Sphenoparietal

    B. Intercavernous

    C. Sigmoid

    D. Occipital

    E. Confluence

    F. Basilar

    G. Transverse

    H. Superior Petrosal

    I. Inferior Petrosal

    J. Cavernous

    K. Superior Sagittal

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    Dr. Supreet Singh Nayyar, AFMC 2012

    www.nayyarENT.com 3

    Dural Venous Sinuses: Lateral

    View

    A. Superior Sagittal Sinus

    B. Great Cerebral Vein

    C. Ophthalmic Veins

    D. Facial Vein

    E. Cavernous Sinus

    F. Inferior Petrosal Sinus

    G. Jugular Vein

    H. Sigmoid Sinus

    I. Superior Petrosal Sinus

    J. Transverse Sinus

    K. Straight Sinus

    L. Inferior Sagittal Sinus


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