Delta waves

Delta waves are high amplitude brain waves that are normally associated with the deep stage 3 of NREM sleep, also known as slow-wave sleep (SWS), and aid in characterizing the depth of sleep.

Overview

Delta waves, like other brain waves, are detected by electroencephalography (EEG). They have a frequency range of 1–4 Hz, and are the slowest and highest amplitude brain waves. They are often associated with the deepest phases of sleep, and are thought to be related to the processes of healing and regeneration in the body.

Function

Delta waves are not only tied to sleep, but also have been observed in very deep states of meditation. They are thought to act as a sort of "psychic shock absorber", reducing the awareness of the physical body and the external world. This allows for a more profound level of insight and internal perception.

Clinical significance

Abnormal delta wave activity can be a sign of several conditions, including encephalopathy, subacute sclerosing panencephalitis, and Creutzfeldt-Jakob disease. In addition, a specific type of delta wave, known as a Bereitschaftspotential, or readiness potential, is associated with the preparation for voluntary movement and decision making processes.

See also

• Theta waves
• Alpha waves
• Beta waves
• Gamma waves

References

Delta waves Resources
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