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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]
Progression from decorticate posturing to decerebrate posturing is often indicative of uncal (transtentorial) or tonsilar brain herniation. Activation of gamma motor neurons is thought to be important in decerebrate rigidity due to studies in animals showing that dorsal-root transection eliminates decerebrate rigidity symptoms. [10]
Shows six types of brain herniation: Supratentorial herniation; Uncal; Central (transtentorial) Cingulate (subfalcine) Transcalvarial; Infratentorial herniation; Upward (upward cerebellar or upward transtentorial) Tonsillar (downward cerebellar) Date: 16 September 2009: Source: Brain herniation types.svg by Delldot: Author: RupertMillard: SVG ...
U.S. President Donald Trump's approval rating has ticked slightly lower in recent days as more Americans worried about the direction of the U.S. economy as the new leader threatens a host of ...
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This may succeed or accompany temporal lobe (uncal) herniation and subfalcian herniation secondary to a supratentorial mass. [ citation needed ] The pathophysiological mechanism is uncertain [ 7 ] but is probably caused by the displacement of the brainstem stretching and tearing perforating branches of the basilar artery to the pons; venous ...