theta wave
physiology
Also known as: theta oscillation
Quick Summary
Theta waves are a pattern of brain activity characterized by a relatively high amplitude and a frequency between approximately four and nine hertz. This brain wave pattern is particularly associated with the hippocampus. The term "theta wave" is also used to refer to the theta rhythm. Delta waves, in contrast, are a different type of brain wave with a lower frequency (less than four cycles per second) and are characteristic of deep sleep.12
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