Electrophysiological investigations have pointed out significant yet weak correlations
between intelligence and oscillatory brain activity, including the spectral power, frequency,
complexity, synchrony, and coherence of electroencephalographic (EEG) signals, however
neglecting the interplay between fast and slow neuronal oscillations underlying information
transfer in the brain. We found that fluid intelligence level (gf) depends on the precise
synchronization of fast oscillations to a specific time window of slow brain rhythms …