You really can KO a person on the arm, but why and how?
Vital Points of Jyodan (Upper Row) and Spots to be attacked
Udenarashi: Center portion of back side of upper arm - Attack by Tettui (Hammer Fist) and Dagger (Knife).
Affects: Fainting - Gives pain to breast and neck portion and cause motor functions to be lost because of stimulation of all the nerves and veins at upper arm.
The value in these old Kyusho notes from Hohan Soken is that they add depth to your Martial Arts moves, techniques and Kata.Luckily he left these targets and the description of affects, it was up to us to find, validate and then spread this information.Now as unbelievable as it sounds, yes you can cause unconsciousness by striking the opponents arm. It is not magic, nor is it pressure points and energy disruption. But it is using kinetic energy focused in a strike with the proper trajectory that causes two ways to cause unconsciousness, one by nerve and one by blood.
The extended films contains the introduction seen above, along with the Anatomical Research and actual demonstration.
To learn the method, targets and see the affect in real time, the extended films are located at these links: