![Paul Stamets with a neural lock](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/b/bd/Paul_Stamets_with_a_neural_lock.jpg/revision/latest/scale-to-width-down/180?cb=20210111065556&path-prefix=en)
Paul Stamets fitted with a neural lock
The neural lock was an Emerald Chain device that could be used to control a person's actions. However, if used on an empath, it would inflict pain so excruciating that it would eventually cause death.
In 3189, an Emerald Chain boarding party used a neural lock to compel Commander Paul Stamets to operate the spore drive. Later, Osyraa had Zareh use a neural lock to torture Cleveland Booker, in an effort to force Commander Michael Burnham to tell them how to reach Theta Zeta. (DIS: "Su'Kal", "That Hope Is You, Part 2")