What is in jugular fossa?
The jugular fossa is a deep depression in the inferior part of the temporal bone at the base of the skull. It lodges the bulb of the internal jugular vein.
What is 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.
Which cranial fossa is the jugular foramen in?
A jugular foramen is one of the two (left and right) large foramina (openings) in the base of the skull, located behind the carotid canal. It is formed by the temporal bone and the occipital bone….
| Jugular foramen | |
|---|---|
| TA98 | A02.1.00.054 |
| TA2 | 458 |
| FMA | 56432 |
| Anatomical terminology |
What enters the jugular foramen?
Meningeal branches of the ascending pharyngeal and occipital arteries enter the jugular foramen. The glossopharyngeal, vagus, and accessory nerves pass through the jugular foramen on the medial side of the jugular bulb. The malleus, incus, and stapes are exposed in the tympanic cavity.
Where is the jugular fossa located?
The jugular fossa is a deep oval depression, located posterior to the carotid canal and medial to the styloid process, which transmits the IJV. The base of the jugular fossa is a dome extending over the posterior foramen lacerum that serves as the floor of the tympanic cavity.
What passes through the jugular foramen quizlet?
the jugular foramen with glossopharyngeal nerve, vagus nerve, and one vein, the internal jugular vein.
Where is the right jugular foramen?
The jugular foramen, also called the posterior foramen lacerum, is situated in the posterior fossa lateral to the carotid canal. The walls of the jugular foramen are formed anterolaterally by the petrous bone and posteromedially by the occipital bone.
What exits the 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).
What foramen does the vagus nerve pass through?
The vagus nerve exits from the medulla oblongata in the groove between the olive and the inferior cerebellar peduncle. It leaves the skull through the middle compartment of the jugular foramen, where it has upper and lower ganglionic swellings, which are the sensory ganglia of the nerve.
What is the jugular foramen quizlet?
The jugular foramen courses anteriorly, laterally, and inferiorly as it insinuates itself between the petrous temporal bone and the occipital bone. is a circular hole in the sphenoid bone that connects the middle cranial fossa and the pterygopalatine fossa.
Which of the following cranial nerves does not pass through the jugular foramen?
hypoglossal nerve
The hypoglossal nerve does not traverse the jugular foramen; however, it joins the nerves exiting the jugular foramen just below the skull base and runs with them in the carotid sheath.
Which of the following does not pass through the jugular foramen?
The hypoglossal nerve does not traverse the jugular foramen; however, it joins the nerves exiting the jugular foramen just below the skull base and runs with them in the carotid sheath.
What is the difference between the jugular foramen and posterior fossa?
Although the jugular foramen is technically an anatomically distinct entity which connects the jugular fossa to the posterior fossa, both contain the same neurovascular structures and lesions present similarly.
What is the most common lesion in the jugular foramen?
The most common jugular foramen lesions are nontumoral pseudolesions (eg, asymmetrically enlarged jugular foramen, high or protruding jugular bulb) and tumors (eg, paraganglioma, metastasis). In nontumoral pseudolesions, computed tomography (CT) demonstrates smooth, intact margins of the jugular foramen.
What is a jugular fossa mass?
Jugular fossa masses comprise a range of pathological lesions that arise from or extend into the jugular fossa in the skull base. Although not a common location for tumors it is not unusual for jugular fossa lesions to be discovered incidentally on cross-sectional imaging.
What is the anteromedial portion of the jugular foramen?
Pars nervosa The pars nervosa is the anteromedial portion of the jugular foramen and is smaller than the larger, posterolateral pars vascularis. It contains: