Table 1. Waveform and classifications of EEG

	Wave	Hz	μV	Feature
Fundamental wave	Alpha	8-13	10-150	Relaxed, steady in normal adults, relaxed, and at rest
Fast wave	Beta	14-30	5-20	Present during cognitive tasks, such as responding to stimuli and decision making
Slow wave	Theta	4-7	Variable	Occurs on awakening, regardless of age