If you are catching the most popular show on cable these days, then you too saw plenty of blades going through zombie brains. Now we all know zombies are analogous with an living human, but clearly it is far more P.C. to blow up and maim zombies in the entertainment arena.
When you don't have actual zombies for a real experiment and clearly human test subjects are out of the question, you always have the pig to utilize for similar anatomy. Anyway, Lynn Thompson stabs a pig and a cow skull with his own Cold Steel Knives, its almost beer o'clock, so just watch the video.