The<unk>  (also known as the<unk>  longitudinal sinus), within the human head, is an unpaired area along the attached margin of the 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<unk>  and is returned to venous circulation.
Superior sagittal sinus
Inferior sagittal sinus
Transverse sinuses
Collateral fissure
Canine fossa
Rhomboid fossa
Optic recess
Suboccipital triangle