AI Sleep Tracker vs Medical EEG: The truth about Oura’s REM accuracy
Executive Summary Technology: The Oura Ring uses infrared PPG sensors, a 3D accelerometer, and a body temperature sensor to estimate sleep stages — including REM — from peripheral physiological signals rather than direct brain activity measurement. [1] Validation: Independent studies and the Gen3 machine-learning algorithm show a 70–80% agreement with clinical polysomnography (PSG) for REM … Read more