| Cerebellopontine cistern | |
|---|---|
| Details | |
| Identifiers | |
| Latin | cisterna pontocerebellaris [1] |
| Anatomical terms of neuroanatomy | |
The cerebellopontine cistern [2] (also pontocerebellar cistern, [1] cerebellopontine angle cistern, or angle cistern [2] ) is a paired subarachnoid cistern at the cerebellopontine angle, an angle created between the cerebellum and the pons on either side. Each cerebellopontine cistern is continuous anteromedially with the pontine cistern. [2]
The cistern contains the (ipsilateral) trigeminal nerve (CN V), facial nerve (CN VII), and vestibulocochlear nerve (VIII), the anterior inferior cerebellar artery, and superior petrosal vein. [2]
 | This section possibly contains original research .(August 2023) |
The Terminologia Anatomica acknowledges the term "pontocerebellar cistern" (Latin: cisterna pontocerebellaris) [1] but not "pontocerebellar cistern". [3] For the term "cerebellopontine angle", it lists the Latin synonym "angulus pontocerebellaris". [4]
The 8th edition of Clinically Oriented Anatomy considers the term "cerebellopontine cistern" as a synonym for "pontine cistern". [5]
The abducens nerve or abducent nerve, also known as the sixth cranial nerve, cranial nerve VI, or simply CN VI, is a cranial nerve in humans and various other animals that controls the movement of the lateral rectus muscle, one of the extraocular muscles responsible for outward gaze. It is a somatic efferent nerve.
The pons is part of the brainstem that in humans and other bipeds lies inferior to the midbrain, superior to the medulla oblongata and anterior to the cerebellum.
The bile duct is a part of the biliary tract. It is formed by the union of the common hepatic duct and cystic duct. It ends by uniting with the pancreatic duct to form the hepatopancreatic ampulla. It possesses its own sphincter to enable regulation of bile flow.
The cisterna magna is the largest of the subarachnoid cisterns. It occupies the space created by the angle between the caudal/inferior surface of the cerebellum, and the dorsal/posterior surface of the medulla oblongata. The fourth ventricle communicates with the cistern via the unpaired midline median aperture. It is continuous inferiorly with the subarachnoid space of the spinal canal.
Terminologia Anatomica is the international standard for human anatomical terminology. It is developed by the Federative International Programme on Anatomical Terminology, a program of the International Federation of Associations of Anatomists (IFAA).
The cerebellopontine angle (CPA) is located between the cerebellum and the pons. The cerebellopontine angle is the site of the cerebellopontine angle cistern.
The musculus uvulae is a bilaterally muscle of the soft palate that acts to shorten the uvula when both muscles contract. It forms most of the mass of the uvula. It is innervated by the pharyngeal plexus of vagus nerve.
The lateral aperture of the fourth ventricle or foramen of Luschka is an opening at the lateral extremity of either lateral recess of the fourth ventricle opening anteriorly into the pontine cistern/lateral cerebellomedullary cistern at cerebellopontine angle. A tuft of choroid plexus commonly extends into the lateral aperture, partially obstructing CSF flow through this aperture.
The tympanic canaliculus is a minute canal in the bony wedge/ridge that separates the carotid canal and jugular foramen/jugular fossa. The proximal opening of the canal is situated upon the inferior surface of the petrous part of the temporal bone; its distal opening is situated upon the floor of the tympanic cavity. The canal gives passage to the tympanic nerve i.e. tympanic branch of glossopharyngeal nerve ), and inferior tympanic artery.
The rectal venous plexus is the venous plexus surrounding the rectum. It consists of an internal and an external rectal plexus. It is drained by the superior, middle, and inferior rectal veins. It forms a portosystemic (portocaval) anastomosis. This allows rectally administered medications to bypassing first pass metabolism.
The pontine cistern is a subarachnoid cistern situated ventrally/anteriorly to the pons. It contains the basilar artery. Each lateral aperture opens into the pontine cistern just posterior to the cranial nerve VIII.
The interpeduncular cistern is the subarachnoid cistern situated between the dorsum sellae (anteriorly) and the two cerebral peduncles of the mesencephalon (midbrain). Its roof is represented by the floor of the third ventricle. Its floor is formed by the arachnoid membrane extending between the temporal lobes of either side. Anteriorly, it extends to the optic chiasm.
The cistern of lateral cerebral fossa is an elongated subarachnoid cistern formed by arachnoid mater bridging the lateral sulcus between the frontal, temporal, and parietal opercula. The cistern contains the middle cerebral artery (MCA) and its branches, and the two middle cerebral veins (MCVs).
The quadrigeminal cistern is a subarachnoid cistern situated between splenium of corpus callosum, and the superior surface of the cerebellum. It contains a part of the great cerebral vein, the posterior cerebral artery, quadrigeminal artery, glossopharyngeal nerve, and the pineal gland.
The ambient cistern is a bilaterally paired subarachnoid cistern situated at either lateral aspect of the mesencephalon (midbrain). Each ambient cistern has a supratentorial compartment and an infratentorial compartment. Each is continuous anteriorly with the interpeduncular cistern, and posteriorly with the quadrigeminal cistern.
The marginal sinus is a dural venous sinus surrounding the margin of the foramen magnum inside the skull, accommodated by the groove for marginal sinus. It usually drains into either the sigmoid sinus, or the jugular bulb. It communicates with the basilar venous plexus anteriorly, and the occipital sinus posteriorly ; it may form extracranial communications with the internal vertebral venous plexuses, or deep cervical veins.
The thyrohyoid branch (also: thyrohyoid branch of ansa cervicalis, or nerve to thyrohyoid (muscle)) is a motor branch derived from the cervical plexus formed by fibres of (the anterior ramus of) the cervical spinal nerve 1 (C1) (and - according to some sources - cervical spinal nerve 2 (C2) as well) that join and travel with the hypoglossal nerve (cranial nerve XII) to reach the suprahyoid region, branching away from CN XII distal to the superior root of ansa cervicalis (which is a branching other fibres of C1-C2 that had traveled with the CN XII), near the posterior border of the hyoglossus muscle. The thyrohyoid branch of ansa cervicalis innervates the thyrohyoid muscle.
The posterior superior nasal nerves are branches of the maxillary nerve that arise in the pterygopalatine fossa and pass through the sphenopalatine foramen into the nasal cavity to innervate the nasal septum, and the posterosuperior portion of the lateral wall of the nasal cavity.
The internal carotid venous plexus is a network of veins surrounding the internal carotid artery as it passes through the carotid canal. The plexus interconnects the internal jugular vein (extracranially) and cavernous sinus (intracranially).
The arcuate eminence is a rounded prominence upon the superior surface of the petrous part of the temporal bone forming the lateral part of the posterior wall of the middle cranial fossa. The arcuate eminence indicates the position of the underlying superior semicircular canal.
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