A research group found that the human sleep patterns could be classified into 16 types by combining ACCEL, their original machine learning algorithm for sleep-wake classification, the dimension ...

The Epworth Sleepiness Scale (ESS) is a questionnaire to check a person’s sleepiness during the day. You can take the test yourself, but the results are more accurate when it's given by a doctor.‌ ...

Most people spend about one-third of their day asleep. While scientists are still unsure exactly why we need sleep, they do know it rejuvenates the body and mind, making it critical for our daily ...

During sleep, the body goes through multiple sleep cycles. Each cycle consists of four stages: three stages of non-rapid eye movement (non-REM) sleep and one stage of rapid eye movement (REM) sleep. A ...