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.
normal and abnormal blood oxygen levels during sleep low sleep apnea oxygen level is a sign that your treatment for sleep apnea is not effective patients with breathing problems during sleep sleep apnea copd often have low oxygen levels in their blood a normal blood oxygen level should be 94 % to 98 %however as a result of not breathing for 30 seconds or more during sleep your sleep apnea oxygen level would drop to 80 % or less keep in mind that anything below 90 % oxygen level is dangerous to your body and require interventionow sleep apnea oxygen level is a sign that your treatment for sleep apnea is not effective patients with breathing problems during sleep sleep apnea copd often have low oxygen levels in their blood