Physiology of death by decapitation
Decapitation is quickly fatal to humans and most animals. Unconsciousness occurs within 10 seconds without circulating oxygenated blood (brain ischemia). Cell death and irreversible brain damage occurs after 3–6 minutes with no oxygen, due to excitotoxicity. Some anecdotes suggest more extended persistence of human consciousness after decapitation, but most doctors consider this unlikely and consider such accounts to be misapprehensions of reflexive twitching rather than deliberate movement, since deprivation of oxygen must cause nearly immediate coma and death ("[Consciousness is] probably lost within 2–3 seconds, due to a rapid fall of intracranial perfusion of blood").A laboratory study testing for humane methods of euthanasia in awake animals used EEG monitoring to measure the time duration following decapitation for rats to become fully unconscious, unable to perceive distress and pain. It was estimated that this point was reached within 3–4 seconds, correlating closely with results found in other studies on rodents (2.7 seconds, and 3–6 seconds). The same study also suggested that the massive wave which can be recorded by EEG monitoring approximately one minute after decapitation ultimately reflects brain death.
Perhaps the most famous such victim was Cicero who, on instructions from Mark Antony, had his hands (which had penned the Philippicae against Antony) and his head cut off and nailed up for display in this manner. France
In France, until the abolition of capital punishment in 1981, the main method of execution had been by beheading by means of the guillotine. Other than a small number of military cases in which a firing squad was used (including that of Jean Bastien-Thiry), the guillotine was the only legal method of execution from 1791, when it was introduced by the Legislative Assembly during the last days of the kingdom French Revolution, until 1981. Before the revolution, beheading had typically been reserved for noblemen and carried out manually. In 1981, President François Mitterrand abolished capital punishment and issued commutations for those whose sentences had not been carried out. The first person executed by the guillotine in France was highwayman Nicolas Jacques Pelletier in April 1792. The last execution was of murderer Hamida Djandoubi, in Marseilles, in 1977. Throughout its extensive overseas colonies and dependencies, the device was also used, including on St Pierre in 1889 and on Martinique as late as 1965. Germany
Fritz Haarmann, a serial killer from Hannover who was sentenced to death for killing 27 young men, was decapitated in April 1925. He was nicknamed "The Butcher from Hannover" and was rumored to have sold his victims flesh to his neighbors restaurant.