- We continue our glossary of terms associated with sleep and sleeping disorders that are part of the vocabulary of sleep solutions.
- Terminal Insomnia – This is used to describe someone who wakes up too early – way before the alarm clock rings.
- Tracheostomy – This is a treatment that is used for those with severe obstructive sleep apnea to overcome an obstruction in the airway that causes problems during sleep.
- Transient Insomnia - The term used to describe those that have difficulty sleeping for short periods of time, usually less than three weeks.
- Twilight Zone – A slang term used for those who are so sleep deprived or suffer from a sleep disorder that their wakefulness is in the “twilight zone.”
- Unattended CPAP Titration Study – This is a sleep study that is performed in the home because it has been determined that the person has a sleep related breathing disorder that might benefit from CPAP therapy.
- Unihemispheric Sleep – A phenomenon that occurs when one side of the brain is asleep while the other is awake. This is usually seen in birds that make long flights or aquatic mammals such as porpoises or dolphins.
- Unintended Sleep Episode – This refers to an incident when you fall asleep when you are not intending to. The most hazardous of these types of episodes occur when someone is driving or using machinery or equipment where people can get seriously injured or killed.
- Upper Airway Resistance Syndrome (UARS) – A severe sleep-related obstructive breathing disorder in which there are repetitive instances of resistance to airflow in the upper airway causing a person to briefly awaken during sleep and cause daytime fatigue.
- Uvulopalatopharpryngoplasty (UPPP) – This is the name of an operation that is often used to treat severe snoring and sleep apnea where the soft tissues on the back of the throat and soft palate are removed. Sometimes the tonsils or excess tissue is also removed at the same time.
- White Noise – A mixture of sound waves that are often used to mask unwanted noise that interferes with sleep. There are machines that are used that have various types of “white noise” such as the sound of waves on a beach, rain, or other rhythmic sounds.
- Zeitgebers – A German word for “time givers” it refers to external cues that affect our sleep cycle including sunlight, familiar morning noises such as the shower running or birds outside or the smell of coffee, that will awaken someone from sleep.
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