Quick Facts
Origin: Forms within the free edge of falx cerebrum by confluence of veins draining the falx cerebrum.
Course: Runs in the lower free margin of the falx cerebri, superior to the corpus callosum.
Tributaries: From the falx cerebrum and from medial surface of cerebral hemispheres.
Drainage: Deeper medial surface of cerebral hemispheres.
Origin
The inferior sagittal sinus is formed within the lower edge of the falx cerebrum, by the confluence of numerous small veins draining the falx cerebrum.
Course
The inferior sagittal sinus runs in the inferior free margin of the falx cerebrum and joins posteriorly with the great cerebral vein of Galen to form the straight sinus.
Tributaries
The inferior sagittal sinus receives tributaries from the falx cerebri, and some small veins from the medial surface of the cerebral hemispheres.
Structures Drained
The inferior sagittal sinus drains the deeper medial surface of cerebral hemispheres and drains the venous blood into the straight sinus.
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Inferior Sagittal Sinus
The inferior sagittal sinus is formed entirely of meningeal dura at the inferior free edge of the falx cerebri.
