6B Measuring sleep

An electroencephalograph (EEG) is a device that detects, amplifies, and records the electrical activity of the brain.

An electromyograph (EMG) is a device that detects, amplifies, and records the electrical activity of the body’s muscles.

An electro-oculograph (EOG) is a device that detects, amplifies, and records the electrical activity of the muscles responsible for eye movement.

Sleep diaries are a record containing self-reported descriptions from an individual about their sleeping periods, including an estimated time spent sleeping and judgements they might have about the quality and nature of their sleep

Video monitoring involves the use of camera and audio technologies to record an individual as they sleep.