In contrast, Manser says, a person's passive vocabulary consists of the words whose meanings they knowâso that they do not have to look the words up in a dictionaryâbut which they would not necessarily use in ordinary conversation or writing (The Penguin Writer's Manual, 2004).
Sleep Apnea, Night Terrors, and Nightmares. Sleep apnea may also be to blame for your nightmares. During sleep apnea, your brain senses the low oxygen and realizes that you are under a very real threatâyou are being choked or smothered by your own bodyâand if nothing is done you will die.
New Cpap machines have replaced the older models that were often uncomfortable for the person to wear. In addition to sleep apnea, anyone who suffers from oxygen deprivation during sleep due to a chronic lung disease can use other ventilators and oxygen therapy to help them sleep. In addition to the Cpap, there is also the Bipap and the Nippv.