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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]
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]
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 ...
Cerebrospinal fluid rhinorrhoea (CSF rhinorrhoea) refers to the drainage of cerebrospinal fluid through the nose (rhinorrhoea).It is typically caused by a basilar skull fracture, which presents complications such as infection.
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 ...
Though Ray admits he’s wary of his sons pursuing careers in entertainment — “It’s an industry full of failure,” he says — he’s supportive as long as they’re following their passions.
A CT is an imaging technique that allows physicians to see inside the head without surgery in order to determine if there is internal bleeding or swelling in the brain. [31] Computed tomography (CT) has become the diagnostic modality of choice for head trauma due to its accuracy, reliability, safety, and wide availability.