النظام الوريدي في الدماغ (أورده المخ) || dural sinuses

شرح النظام الوريدي للدماغ
تصنيف اورده المح
اورده سطحيه
اورده عميقه
The venous system of the brain and its coverings are
primarily composed of the dural sinuses, superficial cortical veins, and deep veins of the cerebrum.
Dural Sinuses. The dural sinuses are very large veins
located within the dura mater of the brain. All the veins
of the head drain into the dural sinuses and ultimately
into the internal jugular veins of the neck. The seven
major dural sinuses are the superior and inferior sagittal, straight, transverse, sigmoid, cavernous, and petrosal . The superior sagittal sinus
lies in the longitudinal fissure between the falx cerebri
and the cranium. It begins at the crista galli, runs the
entire length of the falx cerebri, and ends at the internal
occipital protuberance of the occipital bone . The inferior sagittal sinus, which is
much smaller than the superior sagittal sinus, runs posteriorly just under the free edge of the falx cerebri
within the longitudinal fissure. The inferior sagittal sinus converges into
the great cerebral vein to form the straight sinus. The
straight sinus extends along the length of the junction of
the falx cerebri and the tentorium cerebelli . The junction of the
superior sagittal, transverse, and straight sinuses creates
the large confluence of sinuses or the torcular herophili
The transverse sinuses extend from the confluence of sinuses
between the attachment of the tentorium and the
cranium. As the transverse
sinuses pass through the tentorium cerebelli, they become the sigmoid sinuses. The S-shaped sigmoid sinuses
continue in the posterior cranial fossa to join the jugular
bulbs of the internal jugular veins
The cavernous sinuses, located on each side of the
sella turcica and body of the sphenoid bone, are formed
by numerous interconnected venous channels. They envelop the internal carotid arteries and third through
sixth cranial nerves. Each cavernous sinus receives blood
from the superior and inferior ophthalmic veins and
communicates with the transverse sinuses via the petrosal sinuses

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