Brain herniation is a potentially deadly side effect of very high pressure within the skull that occurs when a part of the brain is squeezed across structures within the skull. The brain can shift across such structures as the falx cerebri, the tentorium cerebelli, and even through the foramen magnum (the hole in the base of the skull through which the spinal cord connects with the brain). Herniation can be caused by a number of factors that cause a mass effect and increase intracranial pressure (ICP): these include traumatic brain injury, intracranial hemorrhage, or brain tumor.
Transtentorial herniations are divided in Descending and ascending transtentorial herniations. We are going to talk about descending transtentorial herniations, especially about uncal herniations. We are going to focus on the anatomy and e have made lots of animations to make it easier for you to understand these concepts. TOREUS RADIOLOGY video.