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Scientifically, an unconscious state is due to a lack of oxygen in the blood stream. This tends to occur in states of panic and fear because the shock is so severe it disrupts the natural mechanism of breathing rhythmically. It can also happen in circumstances of poor air quality, such as a house fire. In this situation the oxygen layer is along the floor beneath the smoke, and is severely sparse amongst the carbon monoxide and dioxide filled smoke, thus meaning you choke, collapse and pass out. The smoke inhalation during unconsciousness is what kills you.
The trick performed in sci-fi show Star Trek by the Vulcans is a 'nerve pinch'. The science behind this clutching assault is that the carotid arteries in the neck are blocked, forcing a person to pass out due to a lack of oxygen to the brain. The show does go on to feature a 'death grip', in which the crude theoretical pinch is excessively applied. In the show, Mr Spock applies the technique to Captain Kirk and induces a 'death like' state, from which he wakes up with a bad headache and sore neck hours late. In real life, blocking the carotid artery for too long would result in either severe brain damage or death.
Any technique to knock somebody out, regardless of the length of time, is dangerous. All methods, be they physical, shock-based or chemical, involve a severe element of hazard. They also break most laws, and can class as anything from assault to grievous bodily harm or even attempted murder.
Scientifically, an unconscious state is due to a lack of oxygen in the blood stream. This tends to occur in states of panic and fear because the shock is so severe it disrupts the natural mechanism of breathing rhythmically. It can also happen in circumstances of poor air quality, such as a house fire. In this situation the oxygen layer is along the floor beneath the smoke, and is severely sparse amongst the carbon monoxide and dioxide filled smoke, thus meaning you choke, collapse and pass out. The smoke inhalation during unconsciousness is what kills you.
The trick performed in sci-fi show Star Trek by the Vulcans is a 'nerve pinch'. The science behind this clutching assault is that the carotid arteries in the neck are blocked, forcing a person to pass out due to a lack of oxygen to the brain. The show does go on to feature a 'death grip', in which the crude theoretical pinch is excessively applied. In the show, Mr Spock applies the technique to Captain Kirk and induces a 'death like' state, from which he wakes up with a bad headache and sore neck hours late. In real life, blocking the carotid artery for too long would result in either severe brain damage or death.
Any technique to knock somebody out, regardless of the length of time, is dangerous. All methods, be they physical, shock-based or chemical, involve a severe element of hazard. They also break most laws, and can class as anything from assault to grievous bodily harm or even attempted murder.
