Wiktionary
a. (context idiomatic English) Obsessively in mind.
Wikipedia
On The Brain is the second studio album by Sheffield indie rock band Bromheads Jacket. Released on 22 September 2008 in the UK.. Recorded in Sheffield's Axis Studio with producers Ross Orton and Mike Timm, the album was preceded by the release of the limited release single "Speaker Box" on 15 June 2008.
The 2nd single from the Album will be "Turn Me On." This will again have a limited release on 7" vinyl and only available at dates on the band's UK Autumn tour.
Usage examples of "on the brain".
A heavy load weighs on the brain, compressing it to an illusion, although the frightening organic reality from which our experiences spring can only be revealed through such sensations.
It is certain that the inanimate objects by which you are surrounded have a direct action on the brain.