superior sagittal sinus


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su·pe·ri·or sag·it·tal si·nus

[TA]
an unpaired dural venous sinus in the sagittal groove, beginning at the foramen caecum and terminating at the confluence of sinuses where it merges with the straight sinus; receives the superior cerebral veins and has lateral extensions, the lateral venous lacunae.

superior sagittal sinus

one of the six venous channels in the posterior of the dura mater that drains blood from the brain into the internal jugular vein. It has no valves. The superior sagittal sinus receives the superior cerebral veins, veins from the diploë and near the posterior extremity of the sagittal suture, the anastomosing emissary veins from the pericranium, and the veins from the dura mater. It also anastomoses with veins of the nose, the scalp, and the diploë. Compare inferior sagittal sinus, straight sinus, transverse sinus.

su·pe·ri·or sag·it·tal si·nus

(sŭ-pēr'ē-ŏr saj'i-tăl sī'nŭs) [TA]
An unpaired dural venous sinus in the sagittal groove, beginning at the foramen caecum and terminating at the confluence of sinuses where it merges with the straight sinus; receives the superior cerebral veins and has lateral extensions, the lateral venous lacunae.

superior sagittal sinus

A long unpaired midline channel through the superior margin of the falx cerebri. It begins in the front near the crista galli of the ethmoid bone, and it extends along the entire inner roof of the skull to the internal occipital protuberance in the back. Its posterior end, called the confluence of the sinuses, is dilated and usually joins the right transverse sinus; however, the other transverse sinus and the occipital sinus also communicate with the confluence of the sinuses. Tributaries of the superior sagittal sinus include ascending frontal cerebral veins, superior cerebral veins, diploic veins draining the skull bones, and a number of irregularly shaped venous lacunae. Numerous arachnoid granulations (sites of the return of water and filtrate from the cerebrospinal fluid) protrude into the superior sagittal sinus.
See also: sinus
References in periodicals archive ?
Stereotactic radiosurgery for duralarteriovenous fistula involving the superior sagittal sinus.
Pierot L, Visot A, Boulin A, et al: combined neurosurgical and neuroradiological treatment of a complex superior sagittal sinus dural fistula: technical note.
6%), one had Pott's puffy tumor alone, and one had superior sagittal sinus thrombosis (table 3).
The patient with Pott's puffy tumor alone underwent an open procedure, and the patient with superior sagittal sinus thrombosis was managed with endoscopic sinus surgery, intravenous medical therapy, and observation.
Case Report: Superior sagittal sinus thrombosis presenting as a continuous headache: a case report and review of the literature.
Nonrandomized comparison of local urokinase thrombolysis versus systemic heparin anticoagulation for superior sagittal sinus thrombosis.
Because the generated ultrasound signal returns in a straight line from the superior sagittal sinus, the actual saturation of hemoglobin in the superior sagittal sinus can be accurately determined.
The clinical presentation includes asymptomatic meningeal involvement (20), encephalopathy (21,22), cranial nerve palsies (23,24,25,26,27), neuropathy (28,29), convulsions or hemiparesis (30), obstruction of the superior sagittal sinus (31) or features of increased intracranial pressure and possibly uncal herniation (26,31).

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