Trepanning, the practice of drilling holes in the skull, dates back to prehistoric times and is thought to have been used in the treatment of mental disorders.
The songs "Down the Drain" and "Droned" were originally released on Bootleg CD by Cave In during spring 2003, and "Trepanning" was originally released in 2004 on a SXSW Hydra Head sampler (demo version), a Daymare Recordings sampler and a Deathwish Inc. sampler.