In a BPAP machine, the level of air pressure is different for inhalation and exhalation. It is often used to treat obstructive sleep apnea. Bilevel positive airway pressure (BPAP) device: A machine that uses pressurized air pumped through the mouth or nose to keep the airway open and prevent lapses in breathing.Bad dream: A dream period that involves negative or bothersome content but does not cause a person to wake up from the dream.In a sleep study, awakenings may be detected by changes in activity levels of the heart, lungs, brain, and muscles. Awakenings: The act of waking up from any stage of sleep.Atonia occurs during rapid eye movement (REM) sleep, stopping muscle activity except for the muscles that control breathing, pulse, and eye movement. Atonia: Temporary paralysis of most muscles of the body.In the context of sleep, aromatherapy typically involves disseminating fragrances meant to induce relaxation at night or alertness during the day. Aromatherapy: The use of specific smells to affect aspects of physical or mental health.Artificial light: Light that comes from a source other than the sun.In a sleep study, arousals may be detected by changes in heart rate, breathing, or muscle activity. Arousal: An abrupt change from a deeper to a lighter stage of sleep or from sleeping toward waking up.When used to describe sleeping problems or disorders, acute is often used to differentiate from chronic conditions. Actigraphy, such as with wearable devices, can be used to measure the amount of time that a person spends doing different types of activities, including sleep. Actigraphy: Tracking the body’s movement over time.There you can find a general overview as well as links to in-depth resources about specific conditions. Readers looking for information about sleep disorders are encouraged to visit our landing page for sleep disorders. Because of their complexity, sleep disorders are not covered in this sleep dictionary.

Good rest synonym