Alpha wave
Alpha wave
Alpha wave (pronunciation: /ˈælfə weɪv/), also known as Berger's wave, is a type of brain wave that oscillates between 8 and 12 Hz. It is typically produced by the brain when a person is awake but relaxed and not processing any information.
Etymology
The term "alpha wave" was coined by the German psychiatrist Hans Berger, who invented electroencephalography (EEG) in 1924 as a method of recording electrical brain activity. The name "alpha" comes from the fact that it was the first type of brain wave discovered.
Related terms
- Electroencephalography (EEG): A method of recording electrical activity of the brain.
- Beta wave: A type of brain wave that oscillates between 12 and 30 Hz, typically associated with active thinking and focus.
- Theta wave: A type of brain wave that oscillates between 4 and 8 Hz, typically associated with drowsiness or the first stage of sleep.
- Delta wave: A type of brain wave that oscillates below 4 Hz, typically associated with deep sleep.
- Gamma wave: A type of brain wave that oscillates above 30 Hz, typically associated with high-level information processing and insight.
See also
External links
- Medical encyclopedia article on Alpha wave
- Wikipedia's article - Alpha wave
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