What is the function of the jugular foramen?
Structure and Function 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.
What is jugular fossa?
The jugular fossa is a depression situated on the inferior surface of the petrous temporal bone posterior to the inferior opening of the carotid canal. It lodges the jugular bulb. Anteriorly lies the jugular foramen.
Where is the jugular foramen on the temporal bone?
The jugular foramen is located between the temporal and the occipital bones. It can be regarded as a hiatus between the temporal and the occipital bones (1). The right foramen is usually larger than the left. The foramen is configured around the sigmoid and inferior petrosal sinuses.
What structures are in the posterior fossa?
The posterior cranial fossa is part of the cranial cavity, located between the foramen magnum and tentorium cerebelli. It contains the brainstem and cerebellum. This is the most inferior of the fossae. It houses the cerebellum, medulla and pons.
Where is the jugular tubercle?
occipital bone
The upper surface of the lateral parts of occipital bone presents an oval eminence, the jugular tubercle, which overlies the hypoglossal canal and is sometimes crossed by an oblique groove for the glossopharyngeal, vagus, and accessory nerves.
What is transmitted through the jugular foramen?
The jugular foramen (JF) is a bony channel that transmits vessels and cranial nerves IX, X, and XI (CNIX, CNX, and CNXI) through the skull base into the carotid space.
What does the middle cranial fossa do?
It houses the temporal lobes of the brain and the pituitary gland. A middle fossa craniotomy is one means to surgically remove acoustic neuromas (vestibular schwannoma) growing within the internal auditory canal of the temporal bone.
Where is middle cranial fossa located in the brain?
The middle cranial fossa is a butterfly-shaped depression of the skull base, which is narrow in the middle and wider laterally. It houses the temporal lobes of the cerebrum.
What is in the jugular foramen?
The jugular foramen is usually divided in 2 portions (6): The pars nervosa, housing the glossopharyngeal nerve and its tympanic branch (Jacobson’s nerve), the inferior petrosal sinus and the meningeal branches of the ascending pharyngeal artery; and the pars vascularis, containing the sigmoid sinus, vagus (and its …
What posterior fossa means?
The posterior fossa is a small space in the skull, found near the brainstem and cerebellum. If a tumor grows in the area of the posterior fossa, it can block the flow of spinal fluid and cause increased pressure on the brain and spinal cord. Most tumors of the posterior fossa are primary brain cancers.