Vulcan nerve pinch

In the fictional "Star Trek" universe, the Vulcan nerve pinch is a technique used mainly by Vulcans to render unconsciousness by pinching a pressure point at the base of the victim's neck.
Origin.
The script for "" stated that Spock "kayoes" (Knocks Out) Captain Kirk (William Shatner)'s duplicate, but Leonard Nimoy, who opposed the Vietnam War and supported Eugene McCarthy, felt that such a brutal action would be unnecessarily violent for a Vulcan. He therefore invented an alternative by suggesting that Vulcans may know enough about human anatomy, or they may have the ability to project telepathic energy from their fingertips, that they could render a human unconscious. Allegedly, the director of the episode did not understand the idea when Nimoy explained it to him, but William Shatner understood immediately and reacted in exactly the way Nimoy had hoped when they executed the move during filming, explaining that it would be similar to "feeling an electrical charge." From then on, the pinch was referred to as the "FSNP", for "Famous Spock Nerve Pinch", in "Star Trek"'s scripts.
Physiology.
Although entirely fictional, fans and critics of the show have tried to explain how the pinch may work. It has been compared to the fictional "karate chop", which was used in other 1960s television series to render opponents unconscious.
Nimoy's theory that the pinch may be linked to telepathy is shown not to be true when two non-telepathic entities, the android Data, and "Voyager"'s holographic Doctor, use the pinch in later "Star Trek" television shows.
The book "The Making of Star Trek" by Stephen E. Whitfield and Gene Roddenberry offers a simple explanation: the pinch blocks blood and nerve responses from reaching the brain, leading to unconsciousness. How this might lead to instantaneous unconsciousness is not explained. In this earliest of "Star Trek" reference books, the pinch is referred to as the "Spock Pinch."
In the "Star Trek: Voyager" episode "", the Doctor inspects a crewmember who was found unconscious and observes an extreme trauma to the trapezius neck bundle, "as though her nerve fibers have been ruptured"; and it is later revealed that the person was the victim of a nerve pinch.
Use within the franchise.
Along with Spock, various other characters in the "Star Trek" franchise have used the technique. Notably, the above-mentioned instances with Data and the holographic Doctor, "s Changeling, Odo, "s Jean-Luc Picard, ""s Seven of Nine. "s T'Pol.
However, it is not an easy technique to master. After Spock uses the pinch in the episode "The Omega Glory", Kirk says to Spock, "Pity you can't teach me that", and Spock replies, "I have tried, Captain." In the film "" (1984), Dr. McCoy was unable to use the nerve pinch despite being in possession of Spock's "katra" (his "spirit" or "soul").
The nerve pinch has been shown being used on animals. In the episode "", Spock uses the nerve pinch on a "Le-matya" (a mountain lion-like creature) to save the life of his younger self. In the 1989 film "", Spock uses the pinch to subdue a horse during a battle.
Popular culture.
The Vulcan nerve pinch has been referred to, and parodied, in a wide variety of television, film, and other media.
Death grip.
The "Star Trek" episode "The "Enterprise" Incident" includes a scene in which Spock administers the "Vulcan death grip" to Kirk to convince Romulan onlookers, apparently unfamiliar with Vulcan techniques, that Kirk had been killed. In fact, Spock had merely used a powerful nerve pinch to put Kirk into a deep unconsciousness that closely resembled death. Kirk awoke later with head and neck pain, but no lasting injury. The "death grip" differs from the "nerve pinch" in that the death grip was administered to Kirk's face. Nurse Chapel remarks in the same episode, "There's no such thing as a Vulcan death grip."