To know all the cerebral herniations and to understand the mechanisms by which its complications may occur.

A thorough knowledge of the cerebral anatomy is essential to understand what happens when a part of the brain herniates to an adjacent compartment or out of the skull if the patient has had prior surgery/trauma. The tentorium cerebelli divides the cranial vault in two compartments: supra and infratentorial (posterior fossa) and the falx divides it in right and left half (figure 1). If we know the anatomy, we will be able to diagnose or suggest complications such as arterial infarctions, acute hydrocephalus, etc.

We intend to provide detailed anatomical description of the brain regions involved in the different hernias through images and clinical cases, with special emphasis on their complications. Subfalcine Herniation (1, 2).It´s the most common hernia (figures 2, 3, 4) What´s going on?:The ipsilateral cingulate gyrus is pushed under the rigid midline falx due to an increase in pressure in any of the cerebral hemispheres. Symptoms:non-specific. Decreased level of consciousness that is directly proportional to the degree of midline shift. Which structures are involved?: - Corpus...

The better we know the brain anatomy, the better we can understand the mechanism of brain herniations and their complications.

1. https://radiopaedia.org/articles/cerebral-herniation. 2. Fred J. Lame, Andrew I.Shedden, Melinda M. Dunn, Nitya R. Ghatak. Acquired Intracranial Herniations: MR Irnaging Findings AJR 1995;165:967-973. 3. Anne G. Osborn. Diagnosis of descending transtentorial Herniation by cranial computed tomography. Radiology 123:93-96, April 1977 4.Richard A. Cuneo, MD;John J. Caronna, MD;Lawrence Pitts, MD;et alJeannette Townsend, MD;David P. Winestock, MDUpward Transtentorial Herniation: Seven Cases and a Literature Review. Arch Neurol.1979;36(10):618-623 5. Audrey G. Sinclair, MBBCh, MRCP, FRCR • Daniel J. Scof ngs, MBBS, MRCP, FRCR. Imaging of the post-operative cranium. RadioGraphics...