A Study on REM Sleep Homeostasis in the Day-Active Tree Shrew (): Cold-Induced Suppression of REM Sleep Is Not Followed by a Rebound.

The function and regulation of rapid-eye-movement (REM) sleep is a topic of ongoing debate. It is often assumed that REM sleep is a homeostatically regulated process and that a need for REM sleep builds up, either during prior wakefulness or during preceding slow wave sleep. In the current study, we tested this hypothesis in six diurnal tree shrews (), small mammals closely related to primates.