When You're Awake and Alert, an EEG Shows a Pattern

When you're awake and alert, an EEG shows a pattern of high- frequency, low- amplitude oscillations known as . When you're awake but resting, the EEG shifts to a new pattern of lower- frequency, higher- amplitude waves known as .

A) alpha waves : beta waves
B) delta waves : theta waves
C) beta waves : alpha waves
D) theta waves : delta waves
E) sigmoid waves : electromagnetic waves