This is an excellent reply to this article; it says what I wanted much better than I did below. I just wanted to point out that I don't recall any procedure fr

This is an excellent reply to this article; it says what I wanted much better than I did below. I just wanted to point out that I don't recall any procedure from the article discussion any sort of "hole drilled" into the patient's head; I believe it was just the MRI and the lumbar puncture that were discussed. The latter is a procedure where a physician puts a needle into the area of your spinal cord down near your lower back. (This area is continuous with the brain, and hence draining CSF from this area will also decrease intracerebral pressure.)