What Is the Cavernous Sinus?
Cavernous sinus (cavemoussinus) is an irregular cavity between the two layers of the dura mater on each side of the saddle, one on each side. Because there are many endothelial fiber trabeculae in the cavernous sinus, the cavity is divided into many small cavities that communicate with each other, making it like a sponge.
- Chinese name
- Cavernous sinus
- Types of
- A pair of important dural sinuses
- lie in
- Sphenoid sinus and sides of pituitary
- Cavernous sinus (cavemoussinus) is an irregular cavity between the two layers of the dura mater on each side of the saddle, one on each side. Because there are many endothelial fiber trabeculae in the cavernous sinus, the cavity is divided into many small cavities that communicate with each other, making it like a sponge.
- The medial end of the superior orbital fissure from the anterior cavernous sinus on each side, reaching back to the tip of the temporal bone rock, is about 2 cm long and 1 cm wide inside and outside. On the cross section, the cavernous sinus is slightly triangular with its tip pointing down. The upper wall migrates inwardly with the saddle; the inner wall fuses with the pituitary sac in the upper part, and the lower part is separated from the sphenoid sinus by a thin bone plate; .
- The cavernous sinuses on both sides communicate with each other through the anterior cavernous sinus in front of the anterior bed process and communicate with the posterior cavernous sinus after the posterior bed process. Therefore, a complete circular venous sinus is formed around the saddle, which is called the circular sinus.
- The cavernous sinus has internal carotid arteries and some brain nerves passing through it. The outer wall of the cavernous sinus is closely related to the stroke of the brain nerves to , which is clinically important. The structure that passes through the outer wall of the cavernous sinus before the anterior bed process has the pulley nerve, oculomotor nerve, and ophthalmic nerve from top to bottom, and the maxillary nerve travels obliquely outward from the outer wall; the internal carotid artery folds inside the cavernous sinus Turn up. In the inner layer of the outer wall of the cavernous sinus between the anterior and posterior bed processes, the oculomotor nerve, the pulley nerve, the ophthalmic nerve, and the maxillary nerve are arranged in order from top to bottom. Inside the sinus cavity, the internal carotid artery and sphincter nerve pass. The sphincter nerve is located between the internal carotid artery and the eye nerve, or in the outer wall of the sinus. After the posterior process, there are only the pulley nerve (upper) and the eye nerve (downer) in the outer wall. The internal carotid artery rises in the sinus and folds forward.