URL of this page: //medlineplus.gov/ency/article/000713.htm. A subdural hematoma is a collection of blood between the covering of the brain (dura) and the surface of the brain. A subdural hematoma is usually the result of a serious head injury. When it occurs this way, it is called an acute subdural hematoma. Acute subdural hematomas are among the deadliest of all head injuries. The bleeding fills the brain area very rapidly, compressing brain tissue.
Mitering Inside Corners. 1  1. Measure the angle of the corner. 2  2. Set a compound miter saw with the correct angles. 3  3. Cut the right inside corner.  4. Set the miter saw angle 1  again. 5. Cut the left inside corner.  6. Fit the two pieces together before nailing them in place.
This is done by design. The angled cuts on the back of the trim are actually oriented at 90 degrees to one another. One of these surfaces is supposed to rest on the wall and the other one is intended to rest up against the ceiling. Take one of your ruined pieces of molding and cut a one foot long piece. Use the inside corner of a framing square to simulate the junction of your wall and ceiling. Hold the cut piece of crown molding inside the square to see what I mean. Note how the back of the crown molding does not touch the wall surface, just the small angled parts of the trim touch the ceiling and wall. Once you understand this relationship, the rest of the job is easy.