Common sleep terms and acronyms

Commonly used acronyms:

ES= Excessive sleepiness
TIB= Time In Bed
TST= Total Sleep Time
Sleep Efficiency= TST/TIB
Sleep Latency= Period before falling asleep
WASO= Wake After Sleep Onset
SWS= Slow Wave (deep) Sleep
REM= Rapid Eye Movement Sleep
Sleep Inertia= Post-wake “fog” before full alertness
PSG= Polysomnogram, measure brainwaves
Actigraphy= Sleep assessment through motion tracking wrist device
PMR= Progressive Muscle Relaxation