Brain herniation - Revision history

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			{{SI}}
			{{Infobox medical condition
			\| name = Brain herniation
			\| image = [[File:Brain_herniation_MRI.jpg\|250px]]
			\| caption = MRI showing brain herniation
			\| field = [[Neurology]], [[Neurosurgery]]
			\| symptoms = [[Headache]], [[vomiting]], [[altered mental status]], [[coma]]
			\| complications = [[Brain damage]], [[death]]
			\| onset = Sudden
			\| duration = Variable
			\| types = [[Subfalcine herniation]], [[transtentorial herniation]], [[tonsillar herniation]]
			\| causes = [[Traumatic brain injury]], [[stroke]], [[brain tumor]], [[abscess]]
			\| risks = Increased [[intracranial pressure]]
			\| diagnosis = [[CT scan]], [[MRI]]
			\| differential = [[Intracerebral hemorrhage]], [[cerebral edema]]
			\| treatment = [[Surgery]], [[osmotic therapy]], [[hyperventilation]]
			\| prognosis = Poor if untreated
			\| frequency = Common in severe [[head injury]]
			}}
	== Brain Herniation ==		== Brain Herniation ==
			[[File:Brain_herniation_types-2.svg\|Types of brain herniation\|left\|thumb]]
	[[File:Brain_herniation_types-2.svg\|Types of brain herniation\|thumb~~\|right~~]]

	'''Brain herniation''' occurs when there is a displacement of brain tissue due to increased intracranial pressure. This condition is a medical emergency and can lead to severe neurological damage or death if not treated promptly.		'''Brain herniation''' occurs when there is a displacement of brain tissue due to increased intracranial pressure. This condition is a medical emergency and can lead to severe neurological damage or death if not treated promptly.

	== Types of Brain Herniation ==		== Types of Brain Herniation ==

	Brain herniation can be classified into several types based on the location and direction of the herniation:		Brain herniation can be classified into several types based on the location and direction of the herniation:

	=== Subfalcine Herniation ===		=== Subfalcine Herniation ===
	[[File:Subfalcine-herniation-001.jpg\|Subfalcine herniation\|thumb~~\|left~~]]		[[File:Subfalcine-herniation-001.jpg\|Subfalcine herniation\|left\|thumb]]
	Subfalcine herniation, also known as cingulate herniation, occurs when the cingulate gyrus is displaced under the falx cerebri. This is the most common type of herniation and can compress the [[anterior cerebral artery]], leading to ischemia.		Subfalcine herniation, also known as cingulate herniation, occurs when the cingulate gyrus is displaced under the falx cerebri. This is the most common type of herniation and can compress the [[anterior cerebral artery]], leading to ischemia.

	=== Transtentorial Herniation ===		=== Transtentorial Herniation ===
	Transtentorial herniation can be further divided into uncal and central herniation:		Transtentorial herniation can be further divided into uncal and central herniation:

	* '''Uncal Herniation''': This occurs when the uncus of the temporal lobe is pushed downward through the tentorial notch. It can compress the [[oculomotor nerve]], leading to a dilated pupil on the affected side, and can also compress the [[brainstem]].		* '''Uncal Herniation''': This occurs when the uncus of the temporal lobe is pushed downward through the tentorial notch. It can compress the [[oculomotor nerve]], leading to a dilated pupil on the affected side, and can also compress the [[brainstem]].

	* '''Central Herniation''': This involves downward displacement of the brainstem and diencephalon through the tentorial notch, potentially leading to [[decerebrate posturing]] and [[coma]].		* '''Central Herniation''': This involves downward displacement of the brainstem and diencephalon through the tentorial notch, potentially leading to [[decerebrate posturing]] and [[coma]].

	=== Tonsillar Herniation ===		=== Tonsillar Herniation ===
	Tonsillar herniation occurs when the cerebellar tonsils are pushed downward through the foramen magnum. This can compress the [[medulla oblongata]], affecting vital functions such as respiration and cardiac function.		Tonsillar herniation occurs when the cerebellar tonsils are pushed downward through the foramen magnum. This can compress the [[medulla oblongata]], affecting vital functions such as respiration and cardiac function.

	=== External Herniation ===		=== External Herniation ===
	External herniation occurs when brain tissue is displaced through a defect in the skull, often due to trauma or surgery.		External herniation occurs when brain tissue is displaced through a defect in the skull, often due to trauma or surgery.

	== Clinical Presentation ==		== Clinical Presentation ==

	The symptoms of brain herniation depend on the type and severity of the herniation. Common signs include:		The symptoms of brain herniation depend on the type and severity of the herniation. Common signs include:

	* Altered level of consciousness		* Altered level of consciousness
	* Headache		* Headache
	* Vomiting		* Vomiting
	* Pupillary changes		* Pupillary changes
	* Abnormal posturing, such as [[File:Decorticate.PNG\|Decorticate posturing\|thumb~~\|right~~]]		* Abnormal posturing, such as [[File:Decorticate.PNG\|Decorticate posturing\|left\|thumb]]

	== Diagnosis ==		== Diagnosis ==
			[[File:Brain_injury_with_herniation_MRI.jpg\|Brain injury with herniation on MRI\|left\|thumb]]
	[[File:Brain_injury_with_herniation_MRI.jpg\|Brain injury with herniation on MRI\|thumb~~\|left~~]]
	Diagnosis of brain herniation is typically made using imaging studies such as [[computed tomography]] (CT) or [[magnetic resonance imaging]] (MRI). These imaging modalities can reveal the displacement of brain structures and the presence of any mass lesions or edema.		Diagnosis of brain herniation is typically made using imaging studies such as [[computed tomography]] (CT) or [[magnetic resonance imaging]] (MRI). These imaging modalities can reveal the displacement of brain structures and the presence of any mass lesions or edema.
			[[File:Brain_herniation_MRI.jpg\|MRI showing brain herniation\|left\|thumb]]
	[[File:Brain_herniation_MRI.jpg\|MRI showing brain herniation\|thumb~~\|right~~]]

	== Treatment ==		== Treatment ==

	Treatment of brain herniation focuses on reducing intracranial pressure and addressing the underlying cause. This may include:		Treatment of brain herniation focuses on reducing intracranial pressure and addressing the underlying cause. This may include:

	* Surgical intervention to remove mass lesions or relieve pressure		* Surgical intervention to remove mass lesions or relieve pressure
	* Administration of [[osmotic diuretics]] such as [[mannitol]]		* Administration of [[osmotic diuretics]] such as [[mannitol]]
	* Hyperventilation to reduce carbon dioxide levels and decrease intracranial pressure		* Hyperventilation to reduce carbon dioxide levels and decrease intracranial pressure
	* Corticosteroids to reduce inflammation		* Corticosteroids to reduce inflammation

	== Prognosis ==		== Prognosis ==

	The prognosis for brain herniation varies depending on the cause, severity, and timeliness of treatment. Early intervention can improve outcomes, but severe herniation can result in permanent neurological deficits or death.		The prognosis for brain herniation varies depending on the cause, severity, and timeliness of treatment. Early intervention can improve outcomes, but severe herniation can result in permanent neurological deficits or death.
			== See also ==
	== ~~Related Pages~~ ==

	* [[Intracranial pressure]]		* [[Intracranial pressure]]
	* [[Cerebral edema]]		* [[Cerebral edema]]
	* [[Traumatic brain injury]]		* [[Traumatic brain injury]]

	[[Category:Neurology]]		[[Category:Neurology]]
	[[Category:Neurosurgery]]		[[Category:Neurosurgery]]

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-'''Brain herniation''' is a potentially fatal condition that occurs when parts of the brain are displaced from their usual position due to increased intracranial pressure. This displacement can compress brain structures and blood vessels, leading to decreased blood flow, oxygen deprivation, and further increase in intracranial pressure, creating a vicious cycle. Brain herniation can result from various causes, including traumatic brain injury, stroke, tumors, and infections.
+== Brain Herniation ==
-<youtube>
+[[File:Brain_herniation_types-2.svg|Types of brain herniation|thumb|right]]
-==Types==
+'''Brain herniation''' occurs when there is a displacement of brain tissue due to increased intracranial pressure. This condition is a medical emergency and can lead to severe neurological damage or death if not treated promptly.
-* [[Uncal herniation]]: This occurs when the uncus of the temporal lobe shifts downward, potentially compressing the brainstem and the third cranial nerve.
+== Types of Brain Herniation ==
-==Symptoms==
+Brain herniation can be classified into several types based on the location and direction of the herniation:
-* Changes in consciousness, ranging from drowsiness to coma
+=== Subfalcine Herniation ===
-* Pupil dilation, particularly on one side, if the third cranial nerve is affected
+[[File:Subfalcine-herniation-001.jpg|Subfalcine herniation|thumb|left]]
-* Changes in breathing patterns
+Subfalcine herniation, also known as cingulate herniation, occurs when the cingulate gyrus is displaced under the falx cerebri. This is the most common type of herniation and can compress the [[anterior cerebral artery]], leading to ischemia.
-* Weakness or paralysis on one side of the body
 * Headache
-* Seizures
+* Vomiting
-==Diagnosis==
+[[File:Brain_herniation_MRI.jpg|MRI showing brain herniation|thumb|right]]
-==Treatment==
+== Treatment ==
-* Medications to reduce brain swelling, such as mannitol or hypertonic saline
+Treatment of brain herniation focuses on reducing intracranial pressure and addressing the underlying cause. This may include:
-==Prognosis==
+* Surgical intervention to remove mass lesions or relieve pressure
-The prognosis for brain herniation depends on the speed of diagnosis and treatment, the underlying cause, and the extent of brain damage. Early intervention can improve outcomes, but the condition can be fatal without prompt treatment.
+* Administration of [[osmotic diuretics]] such as [[mannitol]]
-==Prevention==
+== Prognosis ==
-Preventing brain herniation involves managing conditions that can lead to increased intracranial pressure, such as head injuries, strokes, and brain tumors, with appropriate medical and surgical interventions.
 [[Category:Neurology]]
 [[Category:Neurosurgery]]

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 File:Subfalcine-herniation-001.jpg|Subfalcine herniation
 File:Brain_injury_with_herniation_MRI.jpg|Brain injury with herniation on MRI
 </gallery>

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	{{Medicine-stub}}		{{Medicine-stub}}
			<gallery>
			File:Decorticate.PNG\|Decorticate posturing
			File:Brain_herniation_types-2.svg\|Types of brain herniation
			File:Subfalcine-herniation-001.jpg\|Subfalcine herniation
			File:Brain_injury_with_herniation_MRI.jpg\|Brain injury with herniation on MRI
			</gallery>

Kondreddy Naveen at 21:08, 29 March 2024

2024-03-29T21:08:34Z

New page

'''Brain herniation''' is a potentially fatal condition that occurs when parts of the brain are displaced from their usual position due to increased intracranial pressure. This displacement can compress brain structures and blood vessels, leading to decreased blood flow, oxygen deprivation, and further increase in intracranial pressure, creating a vicious cycle. Brain herniation can result from various causes, including traumatic brain injury, stroke, tumors, and infections.

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&rel=1
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</youtube>

==Types==
There are several types of brain herniation, each with distinct characteristics and implications for treatment and prognosis:

* [[Uncal herniation]]: This occurs when the uncus of the temporal lobe shifts downward, potentially compressing the brainstem and the third cranial nerve.
* [[Central herniation]]: In this type, the diencephalon and parts of the temporal lobes shift downward through the tentorial notch.
* [[Cingulate herniation]]: This involves the displacement of the cingulate gyrus under the falx cerebri.
* [[Transcalvarial herniation]]: Brain tissue herniates through a defect in the skull, often due to surgery or trauma.
* [[Tonsillar herniation]]: Also known as cerebellar or foramen magnum herniation, this occurs when the cerebellar tonsils move downward through the foramen magnum, potentially compressing the brainstem and leading to death.

==Symptoms==
Symptoms of brain herniation can vary depending on the type but may include:

* Changes in consciousness, ranging from drowsiness to coma
* Pupil dilation, particularly on one side, if the third cranial nerve is affected
* Changes in breathing patterns
* Weakness or paralysis on one side of the body
* Headache
* Seizures

==Diagnosis==
Diagnosis of brain herniation involves clinical assessment and imaging studies. Computed tomography (CT) scans and magnetic resonance imaging (MRI) are crucial for identifying the type and extent of herniation.

==Treatment==
Treatment of brain herniation is a medical emergency and focuses on reducing intracranial pressure, treating the underlying cause, and supporting vital functions. Interventions may include:

* Medications to reduce brain swelling, such as mannitol or hypertonic saline
* Ventriculostomy to drain cerebrospinal fluid and relieve pressure
* Surgical decompression to remove the source of increased pressure or to create more space for the swollen brain

==Prognosis==
The prognosis for brain herniation depends on the speed of diagnosis and treatment, the underlying cause, and the extent of brain damage. Early intervention can improve outcomes, but the condition can be fatal without prompt treatment.

==Prevention==
Preventing brain herniation involves managing conditions that can lead to increased intracranial pressure, such as head injuries, strokes, and brain tumors, with appropriate medical and surgical interventions.

[[Category:Neurology]]
[[Category:Neurosurgery]]
[[Category:Medical emergencies]]

{{Medicine-stub}}