Read the history of the guillotine
europeanhistory.about.com/cs/frenchrevolution/a/Guillotine.htm
There has been concern for a lot longer than the last century.
The guillotine, by today’s standards is not humane.
If you had read my post, you would have seen that that Romans came to a point at which they considered crucifixion to be inhumane and thus they went started using burning… people die much quicker when burned.
And it is more humane then the method the English loved to use ----- “hanged, drawn and quartered”. I would choose being burned over this grotesque method any day.
Today we give people drugs so that they are so doped up they are not fully aware of what is happening when they are executed.
The current medical consensus is that life does survive, for a period of roughly thirteen seconds, varying slightly depending on the victim’s build, health and the immediate circumstances of the decapitation. The simple act of removing a head from a body is not what kills the brain, rather, it is the lack of oxygen and other important chemicals provided in the bloodstream. To quote Dr. Ron Wright “The 13 seconds is the amount of high energy phosphates that the cytochromes in the brain have to keep going without new oxygen and glucose” (Cited from
urbanlegends.com, no longer extant). The precise post-execution lifespan will depend on how much oxygen, and other chemicals, were in the brain at the point of decapitation; however, eyes could certainly move and blink.
This solely technical survival forms only part of the answer; the second question is ‘how long does the victim remain aware?’ While the brain remains chemically alive, consciousness can cease immediately, especially if the victim is knocked unconscious by the force of the decapitating blow. Conversely, an individual could remain self-aware - able to see through their eyes and understand what has happened - for much of the thirteen-second period. There is no consistency in this answer, as the precise length of both actual, and practical, survival will vary depending on the victim. Of course, this applies to many forms of swift decapitation, and not just to the victims of
la guillotine.
europeanhistory.about.com/library/bldyk10.htm