Vulcan nerve pinch
From ChrisWiki
The Vulcan nerve pinch is a technique used mainly by Vulcans to render another lifeform unconscious by pinching the base of the victim's neck with all four fingers opposing the thumb. Normally this is done to other humanoids.
The nerve pinch has been used on Vulcans and the Vulcanoid Romulans several times, showing that neither race is immune to the technique.[
