Topic: BHA

Broadband high-frequency activity (BHA, 80-150 Hz) represents a crucial analytic signal in human intracranial recordings, with recent studies showing consistent findings of BHA responses to visual stimulation in magnetoencephalography (MEG). However, it is unclear whether BHA indeed represents visual cortex input or primarily indicates internal changes in brain states. Across three studies, we tested whether BHA signals visual input or changes with internal brain states and can serve as a marker for spatial attention. Using simultaneous EEG-MEG recordings in healthy human subjects, we compared