The inferior sagittal sinus (also known as inferior longitudinal sinus), within the human head, is an area beneath the brain which allows blood to drain outwards posteriorly from the center of the head. It drains (from the center of the brain) to the
straight sinus (at the back of the head), which connects to the
transverse sinuses
The transverse sinuses (left and right lateral sinuses), within the human head, are two areas beneath the brain which allow blood to drain from the back of the head. They run laterally in a groove along the interior surface of the occipital bone. ...
. ''See diagram (at right)'': labeled in the brain as "" (for Latin: ''sinus sagittalis inferior'').
The inferior sagittal sinus courses along the inferior border of the
falx cerebri
The falx cerebri (also known as the cerebral falx) is a large, crescent-shaped fold of dura mater that descends vertically into the longitudinal fissure between the cerebral hemispheres of the human brain,Saladin K. "Anatomy & Physiology: The Uni ...
, superior to the
corpus callosum
The corpus callosum (Latin for "tough body"), also callosal commissure, is a wide, thick nerve tract, consisting of a flat bundle of commissural fibers, beneath the cerebral cortex in the brain. The corpus callosum is only found in placental m ...
.
It receives blood from the deep and medial aspects of the
cerebral hemispheres
The vertebrate cerebrum (brain) is formed by two cerebral hemispheres that are separated by a groove, the longitudinal fissure. The brain can thus be described as being divided into left and right cerebral hemispheres. Each of these hemispheres ...
and drains into the
straight sinus.
Additional images
File:Gray568.png, Sagittal section of the skull, showing the sinuses of the dura.
File:Human brain dura mater (reflections) description.JPG, Human brain dura mater (reflections)
See also
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Dural venous sinuses
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Occipital sinus
The occipital sinus is the smallest of the dural venous sinuses. It is usually unpaired, and is sometimes altogether absent. It is situated in the attached margin of the falx cerebelli. It commences near the foramen magnum, and ends by draining in ...
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Superficial veins of the brain
References
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Veins of the head and neck