Tentorial incisure
Encyclopedia
Tentorial incisure refers to the anterior opening between the free edge of the tentorium cerebelli
Tentorium cerebelli
The tentorium cerebelli or cerebellar tentorium is an extension of the dura mater that separates the cerebellum from the inferior portion of the occipital lobes.-Anatomy:...

 and the clivus
Clivus
Clivus multrum is a type of composting toilet and the name of a company that markets this brandname of composting toilets. "Clivus" is Latin for incline or slope; "multrum" is a Swedish composite word meaning "compost room," thus a "Clivus Multrum" is an inclining compost room.- History :The first...

 for the passage of the brainstem.

Clinical Considerations

If Intracranial pressure superior to the tentorium cerebelli is increased, it may force part of the temporal lobe
Temporal lobe
The temporal lobe is a region of the cerebral cortex that is located beneath the Sylvian fissure on both cerebral hemispheres of the mammalian brain....

 through this notch. This is referred to as a tentorial brain herniation
Brain herniation
Brain herniation, also known as cistern obliteration, is a deadly side effect of very high intracranial pressure that occurs when the brain shifts across structures within the skull...

.
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