Vulcan Neuro-Pressure
Vulcan neuropressure is a mental and physical technique for relaxing the mind and muscles. It is very difficult and takes years to master. Very personal, it requires a great deal of physical contact. An application of neuropressure for combat is the so-called Vulcan nerve pinch. (ENT: "E²")
T'Pol was skilled in the discipline and began administering it to Commander Charles Tucker after his sister died, as he was having trouble sleeping. Tucker soon became quite skilled in neuropressure, mastering techniques such as the surah'tahn and the khavorta posture (which was difficult because of the necessity for a certain breathing method and a relaxed jaw). (ENT: "The Xindi", "Rajiin")
Vulcan science states that neuropressure causes the body to create its own medicines, which means it may have been based on chiropractic. Some chiropractors believe the body's spine can heal any disease or wound. There is no scientific evidence to support this, however. It may also be based on the similarly named accupressure, which is equally lacking in evidence for efficacy.