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Information about Superior Sagittal Sinus

Vein: Superior sagittal sinus
Dural veins (Superior sagittal sinus labeled as "SIN. SAGITALLIS SUP." at top.)
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.
Latinsinus sagittalis superior
subject #171 654
Sourcesuperior cerebral veins
Drains toconfluence of sinuses
MeSH Cranial+Sinuses
Dorlands/Elseviers_12/12739211
The superior sagittal sinus (also known as the superior longitudinal sinus), within a human head, is an area above/behind the brain, which allows blood veins to span the area, from the top of the head towards the back. The sinus drains, along the top and back of the brain, to the transverse sinuses, then to the sigmoid sinuses (at the center of the head), at the internal jugular vein. See diagram (at right): labeled above the brain as "SIN. SAGITALLIS SUP." (for Latin: sinus sagittalis superior).

The superior sagittal sinus occupies the attached or convex margin of the falx cerebri.

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 deviates to either side (usually the right), and 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 chiefly at the back part of the sinus, their orifices being concealed by fibrous folds; numerous fibrous bands (chordæ Willisii) extend transversely across the inferior angle of the sinus; and, lastly, small openings communicate with irregularly shaped venous spaces (venous lacunæ) in the dura mater near the sinus.

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.

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.

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.

Additional images


Left parietal bone. Inner surface.

Frontal bone. Inner surface.

Base of the skull. Upper surface.

Diagrammatic representation of a section across the top of the skull, showing the membranes of the brain, etc.

Diagrammatic section of scalp.


See also

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.
Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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The Superior Cerebral Veins, eight to twelve in number, drain the superior, lateral, and medial surfaces of the hemispheres, and are mainly lodged in the sulci between the gyri, but some run across the gyri.
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confluence of sinuses, which is found beneath the occipital protuberance of the skull. They drain blood into the right and left transverse sinuses.

An older, Latinate term for the confluence of sinuses is torcula herophili.
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Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. Created and updated by the United States National Library of Medicine (NLM), it is used by the MEDLINE/PubMed
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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transverse sinuses (left & right lateral sinuses), within a human head, are 2 areas beneath the brain, which allow blood veins to span the area, from the back of the head towards the nose.
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The sigmoid sinuses (left & right), within a human head, are 2 areas beneath the brain, which allow blood veins to span the area, from the center of the head downward. They drain from the transverse sinuses (under the back of the brain) to the internal jugular vein.
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The internal jugular vein collects the blood from the brain, from the superficial parts of the face, and from the neck.

Path

It is directly continuous with the sigmoid sinus, and begins in the posterior compartment of the jugular foramen, at the base of the skull.
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The falx cerebri, so named from its sickle-like form, is a strong, arched fold of dura mater which descends vertically in the longitudinal fissure between the cerebral hemispheres.
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Foramen cecum (from the Latin meaning blind) can refer to:
  • Foramen cecum (frontal bone)
  • Foramen cecum (tongue)
  • Foramen cecum (medulla oblongata)

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The parietal lobe is a lobe in the brain. It is positioned above (superior to) the occipital lobe and behind (posterior to) the frontal lobe.

The parietal lobe integrates sensory information from different modalities, particularly determining spatial sense and navigation.
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The occipital lobe is the visual processing center of the mammalian brain, containing most of the anatomical region of the visual cortex. The primary visual cortex is Brodmann area 17, commonly called V1 (visual one).
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internal occipital protuberance.

See also

  • external occipital protuberance

External links

  • Roche Lexicon - illustrated navigator, at Elsevier 34257.000-2
  • Diagram at uni-mainz.

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transverse sinuses (left & right lateral sinuses), within a human head, are 2 areas beneath the brain, which allow blood veins to span the area, from the back of the head towards the nose.
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The Superior Cerebral Veins, eight to twelve in number, drain the superior, lateral, and medial surfaces of the hemispheres, and are mainly lodged in the sulci between the gyri, but some run across the gyri.
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Generally, a lacuna is a gap. The term may refer to:
  • Lacuna (manuscripts), a missing section of text
  • Lacuna (music), an extended silence in a piece of music
  • Lacuna (linguistics), a lexical gap in a language

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The Superior Cerebral Veins, eight to twelve in number, drain the superior, lateral, and medial surfaces of the hemispheres, and are mainly lodged in the sulci between the gyri, but some run across the gyri.
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diploë, and this, in certain regions of the skull, becomes absorbed so as to leave spaces filled with air (air-sinuses) between the two tables.

External links

  • x at eMedicine Dictionary

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The dura mater (from the Latin "hard mother"), or pachymeninx, is the tough and inflexible outermost of the three layers of the meninges surrounding the brain and spinal cord. (The other two meningeal layers are the pia mater and the arachnoid mater.
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The periosteum is a thin layer of dense, irregular connective tissue membrane that covers the outer surface of a bone in all places except at joints. (The outer surface of bone at joints is covered with "articular cartilage", a type of hyaline cartilage.
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At the back part of the parietal bone and close to the upper or sagittal border is the parietal foramen, which transmits a vein to the superior sagittal sinus, and sometimes a small branch of the occipital artery; it is not constantly present, and its size varies considerably.
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The dural venous sinuses (also called dural sinuses, cerebral sinuses, or cranial sinuses) are venous channels found between layers of dura mater in the brain.
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Public domain comprises the body of knowledge and innovation (especially creative works such as writing, art, music, and inventions) in relation to which no person or other legal entity can establish or maintain proprietary interests within a particular legal jurisdiction.
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Henry Gray's Anatomy of the Human Body (or Gray's Anatomy as it has commonly been shortened) is an English-language human anatomy textbook widely regarded as a classic work on the subject.
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