Both rate of recurrence (speed) and amplitude (height) of these waves changes as you sleep.
1 of them wake the person up, so someone with poor quality sleep frequently doesn't realize that he or she is not sleeping comfortably. https://business.theeveningleader.com/theeveningleader/article/pressadvantage-2024-4-17-mobile-chiropractors-from-house-call-chiros-expand-services-across-phoenix-valley