النظام الوريدي في الدماغ (أورده المخ) || dural sinuses скачать в хорошем качестве

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