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.
If your oxygen level drops too low, could that cause a non epileptic seizure. 4. Get help from a doctor now âº. Yes and yes: A very low oxygen tension can make people have seizure like activity or unconsciousness depending on the response of the cells of circuitry in your brain.