Produced by Alex Newport, the EP marks the only appearance of founding bassist Eva Gardner until the release of The Mars Volta's self-titled album in 2022.

[6] Regarding the EP's recording sessions, bassist Eva Gardner stated in 2009, "We were in Long Beach somewhere, and it was a really exciting time because it was just this new music.

According to interviews conducted with the band, they held Rodriguez responsible for tormenting Julio Venegas to the point where he committed suicide.

[citation needed] The backwards vocals at the end of "Eunuch Provocateur" are the lyrics from the song "Itsy Bitsy Spider".

Additionally, the title of the EP itself is drawn from the concept story of De-Loused in the Comatorium, referring to the "tremulants", creatures that dwell inside the mind of Cerpin Taxt, the main character.