Fig. 5.

Beta indicates a dynamic state that competes with detection of external stimuli. Spontaneously accruing LFP bursts indicate transient synchrony of flexible cell assemblies. In beta, bursts are followed by a reduction of firing rate and their occupancy is anticorrelated with cue detection. Real-time burst-occupancy detection and adjustment of the stimulus intensity brings the performance back to the average level and thus allows a trial-by-trial counterbalance of the dynamic brain-state effect.