Intracranial elastance

The direct relationship between the intracranial compartments and cerebral dynamics is known as the principle of Munro. An increase in one compartment of the brain will cause a rise in ICP unless there is compensation in another compartment (brain elastance). Although acute rises in ICP due to coughing and sneezing for example, cause little disruption, pathological rises in brain volume will cause a malignant rise in ICE Once a certain level is reached, compensation no longer occurs and small increases in volume will cause major increases in ICP. Brain herniation will then occur and this can be intracranial, transtentorial, tonsillar or cingu-late.

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