superior sagittal sinus

(redirected from Superior sagittal)

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 ?
Unlike ineffective fetal heart rate monitors, Noninvasix's optoacoustic fetal probe uses direct, real-time monitoring of cerebral venous oxygenation in the fetus' superior sagittal sinus to determine the baby's welfare.
The iEEG from patients 3 and 4 was recorded with a similar electrode montage: stereotactic placement of depth electrodes along the hippocampi with 8contact flexible depth electrodes with bilaterally symmetric positioning, in amygdala (LA, RA), mid hippocampus (LH, RH), orbitofrontal areas (LO, RO), and in frontal cortex from superior sagittal region near the supplementary motor area and cingulate (higher electrode numbers were more posterior).
We describe a patient who was diagnosed with renal cell carcinoma (RCC) after the initial survey revealed a superior sagittal sinus thrombosis.
Complex morphology of this region was important in neurosurgical procedures because drilling through bone has a potential risk of damaging the tumor or the adjacent anatomical structures, such as superior sagittal sinus, and might cause massive hemorrhage.
A cranial computed tomographic (CT) scan showed thrombosis of the superior sagittal sinus associated with 3 cerebral hematomas (left frontal and bilateral parieto-occipital) and diffuse cerebral edema with signs of increased intracranial pressure (Figure).
Based on these findings, PRES and superior sagittal sinus thrombosis were considered the differential diagnosis.
Her death was due to heart failure caused by profuse haemorrhage stemming from injury to the Superior Sagittal Sinus (SSS, which runs through the centre of the brain), during the removal of the tumour," Judge Charalambos Charalambous said in his findings.
We defined venous thrombosis as either visualisation of a non-compressible thrombus with Doppler ultrasound (popliteal or femoral venous thrombosis) or a venous filling defect with radio-contrast during computed tomography (CT) (inferior vena cava or superior sagittal sinus thrombosis).
3-5) VGAMs drain via the straight sinus to the torcula but, in the absence of the sinus, drainage is via a persistent falcine sinus to the post third of the superior sagittal sinus.
The MRI scan identified thrombosis of the anterior superior sagittal sinus with bifrontal infarctions.
It appears as an enhancement of the collateral veins in the superior sagittal sinus walls surrounding a nonenhanced thrombus in the sinus.
The classic CT scan sign is the empty delta sign, which consists of a triangular area of enhancement or high attenuation with a relatively low-attenuating center on multiple contiguous transverse CT images obtained in the region of the superior sagittal sinus.

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