What is cerebellar tentorium?
The Cerebellar tentorium ( tentorium cerebelli) is an arched lamina, elevated in the middle, and inclining downward toward the circumference. It covers the superior surface of the cerebellum, and supports the occipital lobes of the brain.
What is the function of the falx cerebri?
The falx cerebri separates the cerebral hemispheres and houses the dural sinuses, into which the blood and cerebrospinal fluid drain. However, it’s exact function is not entirely certain. The function of the falx cerebri may be to constrain the brain and limit its displacement and rotation inside the cranium.
What is tentorium function?
The tentorium cerebelli functions as a partition, dispelling the burden of weight from supratentorial structures upon inferior brain matter.
Where does the tentorium attach?
Gross anatomy The tentorium cerebelli is attached to the falx cerebri at its midline, and this attachment contains the straight sinus. This attachment is more superior than its anterolateral and posterolateral attachments giving it a “tented” appearance 1.
Where in the brain is the tentorium?
The cerebellar tentorium is an arched lamina, elevated in the middle, and inclining downward toward the circumference. It covers the top of the cerebellum, and supports the occipital lobes 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.
What is the falx in the brain?
The falx cerebri is a double-fold of dura mater that descends through the interhemispheric fissure in the midline of the brain to separate the two cerebral hemispheres.
What is a falx in medical terms?
Medical Definition of falx : a sickle-shaped part or structure: as. a : falx cerebri.
What is tentorium mean?
an extension of one of the membranes covering the cerebrum which, with the transverse fissure, separates the cerebrum from the cerebellum. Zoology. (of an insect) the internal skeleton of the head.
What lies directly above tentorium?
The upper surface of the tentorium is continuous with the dura of the floor of the middle cranial fossa. In the midline, the tentorium is attached to the other major partition, the falx, which we’ll add to the picture. This is the falx. Its full name is falx cerebri.
What does it mean to have cerebellar tonsillar ectopia?
An un-uniform term used to describe both asymptomatic tonsillar ectopia and Chiari I malformations, Cerebellar Tonsillar Ectopia indicates an inferior position of the cerebellar tonsils. Cerebellar Tonsillar Ectopia denotes all cases including congenital and acquired in which the cerebellar tonsils are below the base of the skull.
What kind of surgery is needed for tonsillar ectopia?
The most common surgery to treat Cerebellar Tonsillar Ectopia is posterior fossa decompression surgery. This procedure relieves pressure and compression on the brainstem by removing small pieces of bone in the posterior skull, and in turn enlarges the foramen magnum.
Can a new onset tonsillar ectopia cause a headache?
The occipital and exertional headache associated with this malformation can be observed in subjects who have new-onset tonsillar ectopia resulting from repeated lumbar puncture,idiopathic intracranial hypotension, lumboperitoneal shunting, or spontaneous development [34-36].
Where are the cerebellar tonsils located in the skull?
Low-Lying Tonsils: Low-Lying Tonsils lay slightly below the base of the skull, less than approximately 5mm. In Low-Lying Tonsils, the cerebellar tonsils have a slight downward descent through the foramen magnum.