This has very little relevance to the topic at hand as these refer to electroencephalogram measurements taken through a skin (scalp) patch and conductive gel.
Empirically, we'd want data on how corresponding electromagnetic pulses would affect brain activity -- there should be resonance effects, once the amplitude is high enough.
Frequency of Brain Waves
State Frequency range State of mind
Delta 0.5Hz–4Hz Deep sleep
Theta 4Hz–8Hz Drowsiness (also first stage of sleep)
Alpha 8Hz–14Hz Relaxed but alert
Beta 14Hz–30Hz Highly alert and focused