The vocabulary of sleep is quite extensive and many terms are unfamiliar to people even though they might be experiencing some of the symptoms of different types of sleep related disorders.
*Obstructive Sleep Apnea: This is a disorder that occurs when your breathing is interrupted briefly during sleep and results in intermittent reductions in blood oxygen levels that leads to excessive sleepiness during the day because of poor quality sleep. It is often caused by the tongue being in the back of the mouth or a large uvula or a problem with the trachea.
*Obstructive Hypopnea: A partial closure of the throat during sleep can result in less air exchanged in the mouth or nostrils.
*Parasomnia: An occurrence that happens during sleep to disrupt the sleep process such as sleepwalking. They may occur rarely or become more frequent so that medical attention is required.
*Pathological Sleep: This refers to a person with abnormal sleep patterns.
*Perceptual Disengagement: The time when you lose consciousness of outside stimuli and are no longer aware of them.
*Periodic Breathing: This commonly occurs in premature infants and is the repetitive apneic pauses in their breathing.
*Periodic Limb Movement Disorder: This is the movements often associated with a partial awakening but it is the leg movements that a person is usually unaware of unless the movements increase but often they are irregular from one night to the next.
*Persistent Insomnia: This is constant insomnia and wakefulness that is not responding to treatment.
*Pickwickian Syndrome: This is severe obstructive sleep apnea that is usually brought on by obesity that is characterized by lethargy and chronic hypoventilations and hypoxia. It is also called Obesity-Hypoventilation Syndrome.
*PLMD Arousal Index: This is the number of leg movements per hour while you are sleeping.
*Polycyclic: This term refers to multiple sleep periods and wake periods in a 24 hour day.
*Polysomnogram: This is continuous and simultaneous recording of physiological variables during sleep including major muscle activity, brain waves, eye movement and heart activity during a sleep study.
*Polysomnograph: This is a test of the sleep cycles and stages using instruments to measure the multiple physiological variables.
*Post Prandial Drowsiness: This is a need for a nap caused by sleepiness that occurs after a meal.
*Post-Traumatic Stress Disorder: This is when you experience flashback episodes of traumatic events in repetitive dreams or daytime collections.
*Premature Morning Awakening: Early awakening from sleep with inability to return to sleep.
* Quiet Sleep: This is a term that is often used to describe sleeping infants.