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Inferior Sagittal Sinus
Cardiovascular System

Inferior Sagittal Sinus

Sinus sagittalis inferior

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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.

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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

ScienceDirect image

The ISS runs parallel to the SSS in correspondence to the free margin of the cerebral falx, receiving blood from the middle regions of the brain that drains into the SSS through the venous vessels of the cerebral falx.

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