Tonsillar herniation of the cerebellum is also known as a Chiari Malformation (CM), or previously an Arnold Chiari Malformation (ACM). There are at least three types of Chiari malformation that are widely recognized, and they represent very different disease processes with different symptoms and prognosis. These conditions can be found in asymptomatic patients as an incidental finding, or can be so severe as to be life-threatening. This condition is now being diagnosed more frequently by radiologists, as more and more patients undergo MRI scans of their heads. Cerebellar ectopia is a term used by radiologists to describe cerebellar tonsils that are "low lying" but that do not meet the radiographic criteria for definition as a Chiari malformation. The currently accepted radiographic definition for a Chiari malformation is that cerebellar tonsils lie at least 5mm below the level of the foramen magnum. Some clinicians have reported that some patients appear to experience symptoms consistent with a Chiari malformation without radiographic evidence of tonsillar herniation. Sometimes these patients are described as having a 'Chiari [type] 0'.
There are many suspected causes of tonsillar herniation including: decreased or malformed posterior fossa (the lower, back part of the skull) not providing enough room for the cerebellum; hydrocephalus or abnormal CSF volume pushing the tonsils out. Connective tissue disorders, such as Ehlers Danlos Syndrome, can be associated. Grant
For further evaluation of tonsillar herniation, CINE flow studies are used. This type of MRI examines flow of CSF at the cranio-cervical joint. For persons experiencing symptoms with seemingly Max herniation, especially if the symptoms are better in the supine position and worse upon standing/upright, an upright MRI may be useful.[2]
coning is herniation of the brain due to an increased intracranial pressure (ICP). the increased ICP can cause pressure on the brain stem and cause respiratory difficulties such as hyperventilaton and cheyne stocking. coning is a medical emergency and can result in death
coning results from brain shifts into other structures in cases of very high intra cranial pressure
Jacob Coning died in 1724.
The Earth's Moon is considered to be "waning" when it's phase is past "full moon" and changing phases into the "last quarter" and "new moon" phases. After that, it waxes strong again. In the field of medicine, "coning" is a type of brain herniation.
the flang of the wheel should not be flat. it should be in cone sheap in gredent of 1 in 20. this is called coning of wheel.
Coning is an action performed by a potter on a potter's wheel. The potter aplies pressure to the clay in such a way that the clay forms into a cone shape with the point of the cone sticking up. Coning is done so that the clay can be centered more easily and air bubbles will be forced out of the clay. Some potter's think that coning can replace wedging clay.
a cone of ice cream
Coning occurs due to low liquids flow velocities when compared to gas which results in pushing of the liquid away from the tray openings.
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Never
it is its just remastered
do you mean disc honing? No, i mean coning. i refer some documents, maybe the below description is right: Coning occurs because the disc plate would ideally grow in a radial direction as it heats up but the outboard plate is constrained at the hat section causing the outer diameter to be displaced in an outboard direction to form a cone.