Delta (Low)
0.5 Hz
0.5 Hz is near the low end of the delta 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
0.5 Hz is near the low end of the delta band of brain activity, as recorded by EEG (sensors on the scalp). A 2017 glossary from the International Federation of Clinical Neurophysiology (IFCN) puts delta at 0.1 to under 4 Hz. Band edges are conventions and vary by source. Delta activity dominates slow-wave (deep) sleep.
What is said about it
What is said, not what was measured
Popular descriptions link this range to "deep dreamless sleep", unconscious bodily processes and growth hormone release. The largest nightly pulse of growth hormone typically occurs during slow-wave sleep. That is a link with a sleep stage, not with a 0.5 Hz frequency.
Facts
- Frequency
- 0.5 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