Using beamforming techniques in the time-frequency domain, oscillatory induced brain activity can be imaged. Induced activity does not show up in time-domain averages of the data and therefore can be analyzed only using methods based on single-trial analysis like MSBF. MSBFcomputations are performed in the time-frequency domain on a user defined time-frequency range.
The figure is taken from the BrainVoyager program, where an MSBF image computed in BESA was overlaid to the inflated individual MRI. Displayed is a MSBF image of the beta-rebound in a simple reaction time experiment. The subject had to respond with a button press to auditory stimuli. The motor response was performed with the right hand. Applying the MSBF to the beta-rebound (20-26 Hz, 550-850 ms poststimulus) reveals the generator of this rhythm over the contralateral hand-motor area.