superior sagittal sinus

(redirected from Superior longitudinal sinus)

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 ?
Compound depressed fractures of the skull involving the superior longitudinal sinus.
4 Among the aetiological factors associated with IIH, lateral or superior longitudinal sinus thrombosis, menstrual irregularities with obesity, obstructive sleep apnoea, endocrine disorders, including adrenal insufficiency, hyper-adrenalism, and corticosteroid hormone withdrawal, hyperparathyroidism, hypothyroidism, pregnancy, menarche, lupus, intoxication with vitamin A or chlordecone, tetracycline therapy, spinal cord tumours, and the Guillain-BarrACopyright syndrome (GBS) are the most known factors.

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