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	'''~~Cisterna Magna~~''' (also known as the '''cerebellomedullary cistern''') is one of the largest [[~~cistern~~]]~~s of~~ the [[~~subarachnoid space~~]]. It is located between the [[cerebellum]] and ~~the dorsal surface of~~ the [[medulla oblongata]].		== Cisterna Magna ==

			[[File:Gray768.png\|thumb\|right\|Diagram of the cisterna magna]]

			The '''cisterna magna''', also known as the '''cerebellomedullary cistern''', is one of the largest [[subarachnoid cisterns]] in the [[human brain]]. It is located between the [[cerebellum]] and the [[medulla oblongata]], and it is an important structure in the [[central nervous system]] for the circulation of [[cerebrospinal fluid]] (CSF).

	== Anatomy ==		== Anatomy ==

	The ~~Cisterna Magna~~ is ~~a wide~~, ~~cerebrospinal fluid-filled~~ space ~~which~~ communicates with the [[fourth ventricle]] of the brain via the ~~two lateral~~ [[~~foramina~~ of ~~Luschka~~]] ~~and~~ the ~~single, midline~~ [[~~foramen of Magendie~~]]. ~~It is bordered anteriorly by the medulla oblongata~~, ~~posteriorly by~~ the ~~cerebellum~~, and ~~laterally by~~ the ~~cerebellar hemispheres~~.		The cisterna magna is situated in the posterior cranial fossa, beneath the tentorium cerebelli. It is bordered superiorly by the [[cerebellum]], inferiorly by the [[foramen magnum]], and anteriorly by the [[medulla oblongata]]. The cisterna magna is continuous with the [[spinal subarachnoid space]] and communicates with the [[fourth ventricle]] of the brain via the [[foramen of Magendie]].

			== Function ==

			The primary function of the cisterna magna is to act as a reservoir for cerebrospinal fluid. CSF flows from the [[ventricular system]] of the brain into the cisterna magna, where it then circulates around the brain and spinal cord. This fluid provides a cushioning effect, protecting the brain and spinal cord from injury, and also helps in the removal of metabolic waste products from the central nervous system.

	== Clinical Significance ==		== Clinical Significance ==

	The ~~Cisterna Magna is of clinical importance as it~~ is often ~~used~~ as ~~a site for the collection of~~ [[~~cerebrospinal fluid~~]] ~~(CSF) in both humans~~ and ~~animals~~. ~~It is also a common site for~~ the ~~occurrence of~~ [[~~cyst~~]]s, ~~which can cause~~ a ~~variety~~ of ~~neurological symptoms depending on their size and location~~.		The cisterna magna is often evaluated in [[neuroimaging]] studies, such as [[MRI]] and [[CT scans]], to assess for abnormalities. Enlargement of the cisterna magna can be associated with conditions such as [[Dandy-Walker malformation]], while a reduction in size may be seen in cases of [[Chiari malformation]].

	~~== Pathology ==~~

	~~An enlarged Cisterna Magna~~, ~~known~~ as a [[~~Mega cisterna magna~~]], is ~~a condition that can be detected during a prenatal ultrasound~~. This ~~condition~~ is ~~often associated with chromosomal abnormalities such as~~ [[~~Down syndrome]~~] ~~and [[Trisomy 18~~]], but ~~can also occur~~ in ~~otherwise normal individuals~~.		In some medical procedures, such as [[cisternal puncture]], the cisterna magna is accessed to obtain cerebrospinal fluid for diagnostic purposes. This procedure is less common than [[lumbar puncture]] but may be used in certain clinical situations.

	== ~~See Also~~ ==		== Related Pages ==

	* [[Cistern (neuroanatomy)]]
	* [[Cerebrospinal fluid]]		* [[Cerebrospinal fluid]]
			* [[Subarachnoid space]]
	* [[Fourth ventricle]]		* [[Fourth ventricle]]
	* [[~~Foramina of Luschka~~]]		* [[Dandy-Walker malformation]]
	* [[~~Foramen of Magendie~~]]		* [[Chiari malformation]]
	* [[Mega cisterna magna]]

	~~== References ==~~

	~~<references />~~

	~~[[Category:Anatomy]]~~
	[[Category:Neuroanatomy]]		[[Category:Neuroanatomy]]
	~~[[Category:Medical terminology]]~~

	~~{{stub}}~~

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2024-02-20T06:16:11Z

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'''Cisterna Magna''' (also known as the '''cerebellomedullary cistern''') is one of the largest [[cistern]]s of the [[subarachnoid space]]. It is located between the [[cerebellum]] and the dorsal surface of the [[medulla oblongata]].

== Anatomy ==

The Cisterna Magna is a wide, cerebrospinal fluid-filled space which communicates with the [[fourth ventricle]] of the brain via the two lateral [[foramina of Luschka]] and the single, midline [[foramen of Magendie]]. It is bordered anteriorly by the medulla oblongata, posteriorly by the cerebellum, and laterally by the cerebellar hemispheres.

== Clinical Significance ==

The Cisterna Magna is of clinical importance as it is often used as a site for the collection of [[cerebrospinal fluid]] (CSF) in both humans and animals. It is also a common site for the occurrence of [[cyst]]s, which can cause a variety of neurological symptoms depending on their size and location.

== Pathology ==

An enlarged Cisterna Magna, known as a [[Mega cisterna magna]], is a condition that can be detected during a prenatal ultrasound. This condition is often associated with chromosomal abnormalities such as [[Down syndrome]] and [[Trisomy 18]], but can also occur in otherwise normal individuals.

== See Also ==

* [[Cistern (neuroanatomy)]]
* [[Cerebrospinal fluid]]
* [[Fourth ventricle]]
* [[Foramina of Luschka]]
* [[Foramen of Magendie]]
* [[Mega cisterna magna]]

== References ==

<references />

[[Category:Anatomy]]
[[Category:Neuroanatomy]]
[[Category:Medical terminology]]

{{stub}}

Cisterna magna - Revision history

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