A Brief Study on REM (Rapid Eye Movement)

Abstract

Human sleep is broadly classified into two groups: rapid eye movement (REM) and non-rapid
eye movement (NREM). According to the American Academy of Sleep Medicine (AASM) sleep
scoring manual, NREM stage is further divided into N1, N2 and N3 stages with the
progression of sleep. The standard method of sleep analysis is known as polysomnography
(PSG), where several physiological signals are acquired, visually analyzed by sleep
technicians and scored into various stages. Manual analysis and scoring of sleep from PSG
traces (acquired in a clinic or at home) is a tedious task that can take 2–4 h for scoring an
entire night sleep data. It is also prone to subjectivity between scorers with an inter-rater
agreement of 82%. An automatic sleep staging method would help alleviate both inter-rater
and intra-rater disagreements, reduce analysis time and cost of PSG tests.

Keywords: EOG, EMG, Eye, intra-rater, inter-rater rapid