ERPs to auditory standard stimuli. In the "attend auditory" group a typical frontocentral enhanced negativity was seen for attended location stimuli. A similar effect was also seen in the attend visual group. The scalp topography of the attended location minus unattended location difference maps is very similar for the attend auditory and the attend visual groups.
Nager et al. BMC Neuroscience 2006 7:31 doi:10.1186/1471-2202-7-31