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In uncal herniation, a common subtype of transtentorial herniation, the innermost part of the temporal lobe, the uncus, can be squeezed so much that it moves towards the tentorium and puts pressure on the brainstem, most notably the midbrain. [8] The tentorium is a structure within the skull formed by the dura mater of the meninges.
Kernohan's notch is a cerebral peduncle indentation associated with some forms of transtentorial herniation (uncal herniation). [1] [2] It is a secondary condition caused by a primary injury on the opposite hemisphere of the brain. [3]
Duret haemorrhages are haemorrhages secondary to raised intracranial pressure with formation of a transtentorial pressure cone involving the front part of the cerebral peduncles, the cerebral crura. Increased pressure above the tentorium may also involve other midbrain structures. [citation needed]
The free border of the tentorium is U-shaped; it forms an aperture - the tentorial notch (tentorial incisure) - which gives passage to the midbrain.The free border of each side extends anteriorly beyond the medial end of the superior petrosal sinus (i.e. the apex of the petrous part of the temporal bone [citation needed]) to overlap the attached margin, thenceforth forming a ridge of dura ...
cerebral edema , transtentorial herination Cerebral contusion ( Latin : contusio cerebri ), a form of traumatic brain injury , is a bruise of the brain tissue. [ 2 ] Like bruises in other tissues, cerebral contusion can be associated with multiple micro hemorrhages , small blood vessel leaks into brain tissue.
James Watson Kernohan, M.D. (1896–1981) was an Irish-American pathologist born October 1, 1896, in County Antrim, Ireland.He studied medicine at Queen's University Belfast, and in 1922 he emigrated to the United States and subsequently worked as a pathologist at the Mayo Clinic in Rochester, Minnesota.
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Brain herniation, sometimes referred to as brain hernia, is a potentially deadly side effect of very high intracranial pressure that occurs when a part of the brain is squeezed across structures within the skull. Broad ligament hernia, of the uterus. [29] [30]
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