What passes through tentorial notch?
The tentorial notch (also known as the tentorial incisure or incisura tentorii) refers to the anterior opening between the free edge of the cerebellar tentorium and the clivus for the passage of the brainstem. The midbrain continues with the thalamus of the diencephalon through the tentorial notch.
What is the clinical importance of the tentorial notch?
7). The tentorial notch allows for the presence of a gap, which lodges the midbrain [1,6]. The midbrain inhabits the anterior portion of the incisura and the posterior half is occupied by the superior vermis or the splenium of the corpus collosum.
What is most likely to cause brain herniation through the tentorial notch?
Because the skull is rigid after infancy, intracranial masses or swelling may increase intracranial pressure, sometimes causing protrusion (herniation) of brain tissue through one of the rigid intracranial barriers (tentorial notch, falx cerebri, foramen magnum).
What is the Transtentorial notch?
Kernohan’s notch is a cerebral peduncle indentation associated with some forms of transtentorial herniation (uncal herniation). It is a secondary condition caused by a primary injury on the opposite hemisphere of the brain.
Where is the Tentorial notch found?
The tentorial notch refers to the anterior opening between the free edge of the tentorium cerebelli and theclivus for the passage of the brainstem. It’s located between the tentorial edges and communicates the supratentorial and infratentorial spaces.
What is tentorial herniation?
A transtentorial herniation is the movement of brain tissue from one intracranial compartment to another. This includes uncal, central, and upward herniation. These are life-threatening and time-critical pathologies that may be reversible with emergent surgical intervention and medical management.
Where is the Tentorial notch?
What does Infratentorial mean?
Medical Definition of infratentorial : occurring or made below the tentorium cerebelli an infratentorial tumor.
What are the side effects of a temporal lobe stroke?
The side effects sustained after a temporal lobe stroke depend upon the speed of treatment, the size of the stroke, and other factors. The side effects of a temporal lobe stroke affect the function of the temporal lobe, which includes memory, language, and emotion. Here are the 6 most common symptoms and side effects of a temporal lobe stroke:
What happens to the uncus of the temporal lobe?
The uncus of the temporal lobe is forced into the gap between the midbrain and the edge of the tentorium. This compresses the ipsilateral oculomotor nerve, causing a fixed and dilated pupil, and collapses the ipsilateral posterior cerebral artery, causing an infarct in its distribution.
Where does the herniation of the temporal lobe occur?
Uncal (transtentorial) herniation is herniation of the medial temporal lobe from the middle into the posterior fossa, across the tentorial opening. The uncus of the temporal lobe is forced into the gap between the midbrain and the edge of the tentorium.
When does transtentorial herniation occur in the brain?
Central herniation. Transtentorial herniation can occur when the brain moves either up or down across the tentorium, called ascending and descending transtentorial herniation respectively; however descending herniation is much more common. Downward herniation can stretch branches of the basilar artery (pontine arteries),…
