What EEG pattern is typically observed in non-REM sleep?

The EEG pattern that is typically observed in non-REM sleep is delta waves. Delta waves are characterized by their low frequency (typically ranging from 0.5 to 4 Hz) and high amplitude, reflecting the deep stages of sleep where the body is in a restorative state. These waves indicate a state of synchronized neuronal activity, which is vital for physical recovery, growth, and overall health.

During non-REM sleep, particularly in stages 3 and 4 known as slow-wave sleep, delta waves become prominent as the brain transitions into deeper states of relaxation and rest. This is in contrast to the other wave types listed, which are associated with different states of consciousness or activity. High-frequency beta waves are typically linked to alertness and active thinking, alpha waves are associated with relaxed but awake states, and gamma waves are believed to play a role in cognitive functioning and higher mental activity. Each of these waves has distinct characteristics and implications for brain activity outside of non-REM sleep.