sleep onset REM
Also written as: SOREM
Abnormal occurrence of REM sleep within 15 minutes of sleep onset, often associated with narcolepsy and other hypersomnolence disorders.
Full Definition
Sleep onset REM (SOREM) refers to the abnormal occurrence of REM sleep within 15 minutes of sleep onset, which typically should not occur until 60-90 minutes after sleep initiation in healthy adults. SOREMs are characteristic findings in narcolepsy and can also occur in other hypersomnolence disorders, severe sleep deprivation, or circadian rhythm disorders. Multiple Sleep Latency Tests (MSLT) use SOREM episodes as diagnostic criteria, with two or more SOREMs supporting a diagnosis of narcolepsy. Clinical editors should note that SOREMs are always considered pathological findings that require careful documentation and correlation with clinical symptoms.
Usage
Usage note: May be abbreviated as SOREM; always indicate the number of episodes found during testing.
In Context
- "The MSLT revealed three sleep onset REM periods, supporting the diagnosis of narcolepsy." — Sleep study report
- "SOREM episodes occurred in four of five nap opportunities during testing." — Multiple sleep latency test report