Skip to main content

Sleep Stage Fidelity

Meaning

Sleep Stage Fidelity refers to the accuracy and robustness of the progression through the distinct phases of sleep—Non-REM Stages 1, 2, 3 (Slow-Wave Sleep), and REM sleep—without undue fragmentation or premature transitions. High fidelity indicates stable, well-defined sleep cycles that maximize the physiological and cognitive benefits associated with each stage. Poor fidelity, characterized by frequent micro-arousals, diminishes the restorative capacity of sleep. It is the measure of structural quality in sleep architecture.