What is cavernous sinus in anatomy?
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The cavernous sinus is part of the brain’s dural venous sinus and contains multiple neuro-vasculatures. It is situated bilaterally to the sella turcica and extends from the superior orbital fissure anteriorly to the petrous part of the temporal bone posteriorly, and is about 1 cm wide and 2 cm long.
What are the contents of the cavernous sinus?
The contents of the cavernous sinus can be easily remembered with the mnemonic Oh, COAT, that stands for the Oculmotor nerve (III), Internal Carotid artery, Ophthalmic nerve (V1), Abducens nerve (VI), Trochlear nerve (IV).
Where is the cavernous sinus located?
The cavernous sinus is located on either side of the pituitary fossa and body of the sphenoid bone between the endosteal and meningeal layers of the dura. It spans from the apex of the orbit to the apex of the petrous temporal bone.
What is characteristic of the cavernous sinuses?
The cavernous sinuses (one on each side of the sella turcica, above and lateral to the sphenoid sinuses, anteriorly superior orbital fissure and posteriorly petrous part of the temporal lobe) are trabeculated cavernous spaces created by the layers of dura mater and filled with venous blood.
Is the cavernous sinus filled with blood?
It can be life-threatening. The cavernous sinuses are hollow spaces located under the brain, behind each eye socket. A major blood vessel called the jugular vein carries blood through the cavernous sinuses away from the brain.
Which vein spread infection to cavernous sinus?
Infectious cavernous sinus thrombosis results from the progression of facial infections through the facial vein or pterygoid plexus to the cavernous sinus through the superior ophthalmic vein. Sinus and dental infections can also extend into the cavernous sinus.
Which veins drain into cavernous sinus?
The cavernous sinuses receive blood from the superior ophthalmic vein of the orbit, along with the superficial middle cerebral vein of the brain, and other sources. They drain through the transverse sinus, internal jugular vein, and facial vein.
Where is the 3rd cranial nerve?
midbrain
CN III starts in the midbrain. It travels through many structures in your head until it reaches the back of your eyes. Its course includes: Exiting the front of the midbrain.
Is there a model of the cavernous sinus?
Model 1: An overview of the cavernous sinus anatomy is demonstrated (The instructions for use of this and the other following models are as follows: Please use the full screen function for optimal visualization (by clicking on the arrows on the right lower corner of the model).
Does the cavernous sinus receive tributaries from the face?
In addition to receiving venous drainage from the brain, it also receives tributaries from parts of the face . The left and right cavernous sinuses communicate by through the anterior and posterior intercavernous sinuses.
What are the borders of the cavernous sinus?
The cavernous sinuses are located within the middle cranial fossa, on either side of the sella turcica of the sphenoid bone (which contains the pituitary gland). They are enclosed by the endosteal and meningeal layers of the dura mater. The borders of the cavernous sinus are as follows: Anterior – superior orbital fissure.
What does a cavernous sinus venogram look like?
Another example of a cavernous sinus venogram, with the posterior intercavernous sinus (some would call it the upper segment of the basilar venous plexus) shown in white. Superior petrosal sinuses are pink, and carotid artery silhouettes are red.