Theta wave
Theta wave
Theta wave (pronounced /ˈθiːtə/), also known as Theta rhythm, is a type of brainwave pattern that is associated with deep relaxation, meditation, and sleep. The term "Theta" is derived from the Greek letter "θ" (theta), which is used in mathematics and science as a symbol for a specific type of wave.
Definition
Theta waves are low-frequency electroencephalographic (EEG) oscillations in the 4–7 Hz frequency band. They are often associated with drowsiness, hypnagogic and hypnopompic states, and the early stages of sleep.
Function
Theta waves are thought to play a role in sleep, memory, and learning. They are particularly prominent during tasks that require spatial navigation and memory formation. Theta waves are also associated with a state of wakeful relaxation, such as that achieved during meditation or daydreaming.
Measurement
Theta waves can be measured using an EEG, a non-invasive procedure that records electrical activity in the brain. The presence of theta waves is often used as an indicator of sleepiness or drowsiness in sleep studies.
Related Terms
- Alpha wave: A type of brainwave pattern that is associated with relaxed, awake states.
- Beta wave: A type of brainwave pattern that is associated with active, alert states.
- Delta wave: A type of brainwave pattern that is associated with deep, dreamless sleep.
- Gamma wave: A type of brainwave pattern that is associated with high-level cognitive processing.
See also
External links
- Medical encyclopedia article on Theta wave
- Wikipedia's article - Theta wave
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