Rebound Phenomenon

Chief50 · Joined: 11 Dec 2003 Posts: 40

Has anyone heard of this term? Iv'e recently had another sleep study with an increase of pressure on cpap. Stage 4 and REM together amounted to over 50% of total sleep time. The report states that...

"the increased amounts of stage 4 and REM sleep may have reflected a rebound phenomenon after increase of pressure on CPAP"

I have searched the internet for an explanation of this term in reference to OSA, but cannot find anything. I am assuming that it means that I have been so deprived of those sleep stages that now my body is "sucking them up" to try and repay my sleep debt.

Does anyone else have any knowledge of this term or ideas on what it means?

Thanks, Jenny

Chief50 · Joined: 11 Dec 2003 Posts: 40

I just found something!!! I think this is what the term refers to...

REM Rebound: When you are sleep deprived you lose out on two types of sleep, REM and NREM (non-REM). Typically when you have a chance to fall asleep after sleep deprivation you have a tendency to get more REM sleep than you would normally get. This is your body's way of trying to catch up on its REM sleep.

I found the info at the following site: http://www.alleydog.com/glossary/definition.cfm?term=REM%20Rebound

<Toth> · Guest

many people on cpap report a sudden increase in dreaming which is thought to be due to the fact that the brain is no longer being aroused out of dream states by hypoxic episodes.
If the pressure had been recently increased, there could be REM rebound.