Superior sagittal sinus: Difference between revisions
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{{Infobox Vein | |
{{Infobox Vein |of sinuses]] | |
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Name = Superior sagittal sinus | |
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Latin = sinus sagittalis superior | |
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GraySubject = 171 | |
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GrayPage = 654 | |
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Image = Gray488_blue.gif | |
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Caption = Dural veins (superior sagittal sinus labeled as "SIN. SAGITALLIS SUP." at top) | |
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Image2 = Gray566.png | |
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Caption2 = Superior sagittal sinus laid open after removal of the skull cap. The chordæ Willisii are clearly seen. The venous lacunæ are also well shown; from two of them probes are passed into the superior sagittal sinus. | |
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DrainsFrom = | |
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Source = [[superior cerebral veins]] | |
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DrainsTo = [[confluence of sinuses]] | |
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Artery = | |
Artery = | |
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MeshName = Cranial+Sinuses | |
MeshName = Cranial+Sinuses | |
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It is triangular in section, narrow in front, and gradually increases in size as it passes backward. |
It is triangular in section, narrow in front, and gradually increases in size as it passes backward. |
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Its inner surface presents the openings of the [[superior cerebral veins]], which run, for the most part, obliquely forward, and open |
Its inner surface presents the openings of the [[superior cerebral veins]], which run, for the most part, obliquely forward, and open Image:Gray135.png|Frontal bone. Inner surface. |
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There are usually three [[lacunæ]] on either side of the sinus: a small frontal, a large parietal, and an occipital, intermediate in size between the other two. |
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Most of the cerebral veins from the outer surface of the hemisphere open into these lacunæ, and numerous arachnoid granulations (Pacchionian bodies) project into them from below. |
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The superior sagittal sinus receives the [[superior cerebral veins]], veins from the [[diploë]] and [[dura mater]], and, near the posterior extremity of the sagittal suture, veins from the [[pericranium]], which pass through the [[parietal foramina]]. |
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==Additional images== |
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<gallery> |
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File:Superior sagittal sinus.jpg|Superior sagittal sinus |
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Image:Gray133.png|Left parietal bone. Inner surface. |
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Image:Gray135.png|Frontal bone. Inner surface. |
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Image:Gray193.png|Base of the skull. Upper surface. |
Image:Gray193.png|Base of the skull. Upper surface. |
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Image:Gray769.png|Diagrammatic representation of a section across the top of the skull, showing the membranes of the brain, etc. |
Image:Gray769.png|Diagrammatic representation of a section across the top of the skull, showing the membranes of the brain, etc. |
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Revision as of 15:49, 27 November 2012
| {{{Name}}} | |
|---|---|
| Identifiers | |
| MeSH | D054063 |
| TA98 | A12.3.05.109 |
| TA2 | 4856 |
| FMA | 50767 |
| Anatomical terminology | |
The superior sagittal sinus (also known as the superior longitudinal sinus), within the human head, is an unpaired area along the attached margin of falx cerebri. It allows blood to drain from the lateral aspects of anterior cerebral hemispheres to the confluence of sinuses. Cerebrospinal fluid drains through arachnoid granulations into the superior sagittal sinus and is returned to venous circulation. See diagram (at right): labeled above the brain as "SIN. SAGITALLIS SUP." (for Latin: sinus sagittalis superior).
Anatomy
Commencing at the foramen cecum, through which it receives a vein from the nasal cavity, it runs from anterior to posterior, grooving the inner surface of the frontal, the adjacent margins of the two parietal lobes, and the superior division of the cruciate eminence of the occipital lobe. Near the internal occipital protuberance, it drains into the confluence of sinuses and deviates to either side (usually the right). At this point it is continued as the corresponding transverse sinus.
It is triangular in section, narrow in front, and gradually increases in size as it passes backward.
Its inner surface presents the openings of the superior cerebral veins, which run, for the most part, obliquely forward, and open Image:Gray135.png|Frontal bone. Inner surface.
Image:Gray193.png|Base of the skull. Upper surface. Image:Gray769.png|Diagrammatic representation of a section across the top of the skull, showing the membranes of the brain, etc. Image:Gray1196.png|Diagrammatic section of scalp. Image:Human brain dura mater description.JPG|Human brain dura mater
</gallery>
See also
References
This article incorporates text in the public domain from page 654 of the 20th edition of Gray's Anatomy (1918)
