Sarjenka's memories are erased in 2365
memory wipe was a medical procedure designed for the purpose of selectively eliminating memory engrams from the mind of an individual. It was different from a memory block, in which the memory was merely supressed.
neural neutralizer was an early attempt at a device for erasing memories. ( : " TOS ")
Dagger of the Mind
Katherine Pulaski developed a memory wipe technique which was effective on many humanoid species. It was used on Sarjenka, a young girl from the pre-warp civilization on Drema IV, in order to prevent her from telling her people of her experiences with the Enterprise. ( : " TNG ")
The technique was not successful on all humanoids, however.
Mintakans were unaffected by the memory wipe ( : " TNG "), as were the Who Watches The Watchers Boraalans ( : " TNG ").
A memory wipe was used by Dr.
Julian Bashir to reassign Kurn's identity to Rodek in 2372. ( : " DS9 ")
Sons of Mogh
2374, the Ramurans used a neurolytic emitter to erase memories of recaptured refugees. ( : " VOY ")