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. ()
Medical equipment