A clip from here:
http://www.1for1.com/Article_about_Martial-arts-strikes-to-the-nose-a-3804.htmlHow many times while watching television have we all seen the "bad guy" in the show land a palm-heal strike to the nose of another actor who immediately hit the floor and stayed there? How many times have you heard your children, or better yet, some self-proclaimed authority on the subject tell you, "when somebody hits you like that it drives the nose bone into the brain and kills you?"
If you have heard this so called wisdom spouted, you have actually heard a wives tale invented by Hollywood. This concept of the "nose bone" being shoved into the brain is so deeply rooted in the social consciousness that regardless of your expertise in martial arts, you probably won't be able to shake someone else's belief.
A simple look into basic human anatomy should give people an idea of the ridiculousness of this belief. The "bony" part of the nose isn't really bone at all. It is cartilage. For those who doubt this, reach up and actually feel your own nose! It moves, bends and FEELS soft. Now feel any of the other bones of your body. Do any of them feel the same? Can you smush or move them in the same manner? Of course not, this is because bone is thick and solid whereas cartilage is soft and moveable. Think of your ear, it is formed by cartilage.
Can a blow to the nose kill someone? Yes! If enough force and skill is used the blow could cause fractures of the facial bones or shock trauma to the brain. This trauma causes hemorrhaging (bleeding) within the brain or cranium and requires immediate medical care. If you doubt this, ask any emergency room worker about it.
Blows to the nose in self-defense can prove to be very effective both physically and psychologically against an assailant. Almost any tap to the nose causes pain and the eyes to water. A good solid hit will cause a satisfying crunch and copious amounts of bleeding. The sight of their own blood has caused many an attacker to change their mind.
When the nose is broken, it not only bleeds, it starts to swell and causes the surrounding areas (eyes) to do the same. Between the bleeding and the swelling, it becomes almost impossible for a person to breath through the nose. Between all of these symptoms, it is human nature to back away, grab the injured area and see if there really is blood. If there is blood, the mind starts wondering just how much it is flowing.