Obstructive sleep apnoea hypopnoea syndrome (OSAHS) is a condition in which the upper airway becomes blocked repeatedly during sleep. This can intermittently reduce airflow (hypopnoea) or stop airflow ...

Sleep is important for health. Many people do not get enough sleep. Doctor Nathaniel Kleitman created the spoon test. This test checks how fast someone falls asleep. Falling asleep too quickly may ...