Straight sinus

Straight sinus
Dural veins (Straight sinus labeled as 'SIN. RECTUS' at center right.)
Dura mater and its processes exposed by removing part of the right half of the skull, and the brain. (Straight sinus visible as blue line at center left.)
Details
Source	inferior sagittal sinus, great cerebral vein
Drains to	confluence of sinuses
Identifiers
Latin	sinus rectus
MeSH	A07.231.908.224
TA	A12.3.05.112
FMA	50769
*Anatomical terminology* [edit on Wikidata]

The straight sinus, also known as tentorial sinus or the sinus rectus, is an area within the skull beneath the brain that receives venous blood. The straight sinus receives blood from the superior cerebellar veins and inferior sagittal sinus and drains into the confluence of sinuses.

Structure

The straight sinus is situated within the dura mater, where the falx cerebri meets the midline of tentorium cerebelli.^[1] In cross-section it is triangular, contains a few transverse bands across its interior, and increases in size as it proceeds backward.

Function

It forms from the confluence of the inferior sagittal sinus and great cerebral vein.

The straight sinus is an unpaired area beneath the brain which allows blood to drain from the inferior center of the head outwards posteriorly. It receives blood from the inferior sagittal sinus, great cerebral vein, posterior cerebral veins, superior cerebellar veins and veins from the falx cerebri.^[1]

Additional images

Tentorium cerebelli from above.
Straight sinus

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

1 2 Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students. Philadelphia: Elsevier/Churchill Livingstone. p. 795. ISBN 978-0-443-06612-2.

External links

http://neuroangio.org/venous-brain-anatomy/venous-sinuses/[]

Veins of the head and neck

External jugular

Retromandibular	maxillary pterygoid plexus superficial temporal anterior auricular

Direct	posterior auricular transverse cervical suprascapular anterior jugular jugular venous arch

Internal jugular

Diploic/brain

Cerebral

Superficial:	superior superficial middle inferior inferior anastomotic (Labbé) superior anastomotic (Trolard)

Deep:	great internal basal deep middle superior thalamostriate

Cerebellar

Sinuses

To COS	superior sagittal straight inferior sagittal occipital

To CS	sphenoparietal intercavernous superior ophthalmic ethmoidal central retinal nasofrontal vorticose veins inferior ophthalmic

To IJV	sigmoid: transverse petrosquamous superior petrosal inferior petrosal basilar plexus internal auditory veins condylar

Facial/common facial

Direct

Brachiocephalic

Vertebral	occipital occipital emissary suboccipital venous plexus deep cervical

Direct	inferior thyroid inferior laryngeal thymic

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