Research › QEEG, Methods & Mechanisms
Effects of 18.5 Hz Auditory and Visual Stimulation on EEG Amplitude at the Vertex
Study at a glance
- Area
- QEEG, Methods & Mechanisms
- Authors
- Frederick JA, Lubar JF, Rasey HW, Brim SA, Blackburn J
- Journal
- Journal of Neurotherapy
- Year
- 1999
- Participants
- 15
- Population
- Adults
- Protocol
- 18.5 Hz audio-visual stimulation
Key findings
- EEG peaked at the 18.5 Hz stimulation frequency
- Sound or light alone also entrained the EEG
Fifteen college students had their EEG recorded during 18.5 Hz sound, light, or sound-and-light stimulation. Activity in the 13–21 Hz band rose, peaking right at 18.5 Hz, which shows the stimulation entrains brain rhythms and could help prepare the brain for neurofeedback. The effect spread little to nearby frequencies, so varying the stimulation frequency may work better.