Does the sigmoid sinus pass through the jugular foramen?
Does the sigmoid sinus pass through the jugular foramen?
The sigmoid sinus courses along the floor of the posterior cranial fossa to enter the jugular foramen. It drains into the jugular bulb via which it connects with the internal jugular vein.
What exits through jugular foramen?
Intradurally, the glossopharyngeal, vagus, and accessory nerves leave the intracranial compartment through the jugular foramen. These nerves leave the medulla and upper cervical spinal cord and transverse the lateral cerebellomedullary cistern before entering the jugular foramen (Figure 6).
Which of the following sinuses passes through the jugular foramen?
The jugular foramen is a large opening between the jugular process of the occiput and the petrosal portion of the temporal bone, set at the posterior end of the petro-occipital suture. In it are joined the sigmoid and the inferior petrosal sinuses.
Where does the sigmoid sinus drain into?
Sigmoid sinuses are also paired sinuses known for their S-shape sinus found in the base of the cranial fossa posteriorly. Left and right sigmoid sinuses collectively drain venous blood into the internal jugular vein, which exits at the jugular foramen.
What structures lie in the jugular foramen?
The important structures surrounding the jugular foramen include the mastoid segment of the facial nerve laterally, the petrous segment of the internal carotid artery (ICA) anteromedially, the vertebral artery inferiorly, and the hypoglossal nerve medially.
What is a sigmoid sinus?
The sigmoid sinus is a large blood vessel that is part of the main venous blood flow that leaves the brain and drains into the jugular vein. The sinus exists on both sides. The sinus is covered normally in bone through the temporal bone near the middle and inner ear.
What is the importance of the jugular foramen?
The jugular foramen is a cavity formed by the petrous part of the temporal bone anteriorly and the occipital bone posteriorly. Its major function is to act as a conduit for essential structures to pass through.
Where is your jugular foramen?
The jugular foramen is situated in an oblique plane along the skull base. Its boundaries include the petrous temporal bone anterolaterally and the jugular process of the occipital condyle posteromedially. The jugular foramen is usually larger on the right than on the left.
Where is the sigmoid sinuses located?
The sigmoid sinus is a dural venous sinus that lies deep within the human head, and just below the brain. A dural sinus is a channel that lies between the dura mater, the outermost tissue covering the brain.
