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Related to coning: Ear coning
the squeezing of the brain and brainstem through the foramen magnum as a result of swelling. It may lead to a loss of basic cardiorespiratory function.
coning(kō′nĭng) [Gr. konos, cone]
Herniation of the brain through the foramen magnum. This is a neurological catastrophe that almost always results in death.