Fal-tor-pan

The Fal-tor-pan is a synaptic pattern displacement technique that trained members of the Vulcan people, such as the High Priestesses of Mount Seleya, are capable of accomplishing. The purpose of the ritual is to reunite the katra of a Vulcan with their body.

The ritual is considered very dangerous to perform and is done so rarely on very few occassions. This is because of the state of the recently deceased person and the keeper of the katra itself.

A variant form of this ritual was conducted on Captain Jonathan Archer to remove the katra of Surak. (ENT episode: Kir'Shara)

The katra of Spock was reunited with his body at Mount Seleya in 2286. (TOS movie: The Search for Spock)