"After recalling a memory, participants learned how to use a cognitive skill called mental rotation, which involves rotating 2D and 3D shapes using your ‘mind’s eye’. They then used this skill to play a slower form of the video game Tetris, which similarly involves rotating geometric blocks. This is thought to occupy the brain’s visuospatial areas, competing with the visual flashback, weakening its vividness and emotional impact – and critically, the frequency with which it intrudes."
Well this is fucking fascinating. It's almost like you're symbolically working through the traumatic event in a way that it can actually be 'solved'.