Theta (Low)
4.00 Hz
4 Hz is the lower edge of the theta band of brain activity, as recorded by EEG (sensors on the scalp).
How well is this supported?
Measured directly, or defined by a published standard.
The band is a standard way of describing EEG recordings. Band edges are conventions, and what a person experiences varies. This is not medical information.
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About this number
4 Hz is the lower edge of the theta band of brain activity, as recorded by EEG (sensors on the scalp). A 2017 glossary from the International Federation of Clinical Neurophysiology (IFCN) puts theta at 4 to under 8 Hz. Band edges are conventions and vary by source. Theta-range activity appears in drowsiness and REM sleep and is studied in memory.
What is said about it
What is said, not what was measured
Popular descriptions link this range to deep meditation, the hypnagogic state (the edge of sleep), creativity and "subconscious access". Links between theta activity and meditation are reported but variable. "Subconscious access" is a popular phrase, not a scientific term.
Facts
- Frequency
- 4.00 Hz
- Kind of statement
- EEG band
- Filed under
- Brainwave bands
Sources
- IFCN glossary of EEG terms
The standard definitions of the delta, theta, alpha, beta and gamma bands.
N. Kane et al., Clinical Neurophysiology Practice 2 (2017) 170–185.
View source: IFCN glossary of EEG terms