John-Dylan Haynes et. el (2007) Reading Hidden Intentions in the Human Brain. Current Biology, Volume 17, Issue 4, pp.323-328. doi:10.1016/j.cub.2006.11.072
@Here we study subjects who freely decided which of two tasks to perform ... it is possible to decode from activity in medial and lateral regions of prefrontal cortex which of two tasks the subjects were covertly intending to perform.@