Straight sinus

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Vein: 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.)
Latin	sinus rectus
Gray's	subject #171 655
Source	inferior sagittal sinus, great cerebral vein
Drains to	confluence of sinuses
MeSH	Cranial+Sinuses
Dorlands / Elsevier	s_12/12739157

The straight sinus (also known by the alternate anatomical term tentorial sinus), within the human head, is an area beneath the brain, which allows blood veins to span the area, from the center of the head towards the back. It drains from the inferior sagittal sinus (from the center of the brain) to the transverse sinuses (at the back of the head), then to the sigmoid sinuses below the brain. See diagram (at right): labeled in the brain as "SIN. RECTUS" (for Latin: sinus rectus).

The straight sinus (tentorial sinus) is situated along the junction of the falx cerebri and the tentorium cerebelli.

It forms from the confluence of the inferior sagittal sinus and great cerebral vein (great vein of Galen). In cross-section it is triangular, contains a few transverse bands across its interior, and increases in size as it proceeds backward. It receives the superior cerebellar veins.

The terminal part of the straight sinus drains into the confluence of the sinuses.

1 Additional images
2 See also
3 References
4 External links

[edit] Additional images

Tentorium cerebelli from above.

Human brain dura mater (reflections)

[edit] See also

Dural venous sinuses

[edit] References

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

[edit] External links

Straight+sinus at eMedicine Dictionary

v • d • e

Veins (emissary, jugular and others) and sinuses of head and neck (drainage patterns can vary)

to external jugular

retromandibular: maxillary • superficial temporal (anterior auricular)

posterior auricular

transverse cervical - suprascapular - anterior jugular (jugular venous arch)

to internal jugular

Diploic/brain	cerebral: superior • middle • inferior • great • internal (basal, superior thalamostriate) cerebellar: superior • inferior To COS: superior sagittal • straight (inferior sagittal) • occipital To CS: sphenoparietal • intercavernous superior ophthalmic (ethmoidal, central retinal, nasofrontal) • inferior ophthalmic • vorticose veins To IJV: sigmoid: transverse (petrosquamous) • superior petrosal inferior petrosal (basilar plexus, internal auditory veins) - condylar

Other	common facial • facial (frontal, supraorbital, angular, superior labial, inferior labial, deep facial) • pterygoid plexus lingual (dorsal lingual, deep lingual, sublingual) • pharyngeal • thyroid (superior/superior laryngeal, middle)