You can't effectively scream at night, especially during sleep, because your brain paralyzes your muscles (atonia) during REM sleep to stop you from acting out dreams, and if you try to scream during sleep paralysis, it comes out as a whisper or not at all, though you can have night terrors where you do scream and thrash while only partially awake. This inability to vocalize is a protective mechanism, but when you're in the confused state of sleep paralysis, the conscious mind feels trapped, unable to move or speak despite being awake enough to feel fear.
Night Terrors in Adults
Night terrors among adults may be more dramatic than those in kids. An adult having a night terror may let out a piercing scream or move out of bed in a violent way. Night terrors in adults can lead to injury in some cases. Night terrors can indicate an underlying problem in adults.
If you try to scream while asleep and it doesn't come out right, it can be an artifact of the discrepancy between dream reality and waking reality. In a dream you try to scream, but your nervous system is muted while dreaming so you don't actually scream.
Sleep terrors are a type of parasomnia. A parasomnia is a disturbing or strange behavior or experience during sleep. People who have sleep terrors don't completely wake up from sleep during the episodes. Their appearance may suggest they are awake, but they remain partially asleep.
Dr. Barone: If you witness someone screaming and thrashing in their sleep, your first instinct might be to jolt them awake. However, you shouldn't wake someone who is having a night terror, as it can disorient them, prolong the night terror, and can even be dangerous for both parties.
People with apnea often toss and turn and otherwise show signs of restless nighttime sleep. If you find yourself kicking, thrashing, jerking or waking up under a twisted pile of disheveled sheets, apnea might be a possible cause. When you're struggling to breathe at night, your sleep becomes disrupted.
Most experts believe that lucid dreams are the rarest type of dreams. While dreaming, you are conscious that you are dreaming but you keep on dreaming. According to researchers, 55 percent of people experience these types of dreams at least one time in their life.
PTSD and Night Terrors
Approximately 96% of people with PTSD experience terrifying nightmares that are so vivid that they seem real. Unlike bad dreams, night terrors have physical manifestations such as thrashing, flailing, screaming, and even sleepwalking.
So how can you know whether or not you're being warned? Goll recommends noting anything out of the ordinary. “God will speak warnings more than once,” he says. “Either you'll have the same dream again or you'll keep hearing a phrase in your waking life that brings you back to the dream.”
Sleep demons—or the hallucinations that come with sleep paralysis—can't harm you physically. Even though the experience can feel very real and terrifying in the moment, sleep paralysis itself is completely harmless.
People also have feelings of drowning or sinking, being dragged out of bed or of flying, numbness, and feelings of electric tingles or vibrations running through their body. Sleep paralysis may include hallucinations, such as an intruding presence or dark figure in the room.
The night hag is the name given to a supernatural creature, commonly associated with the phenomenon of sleep paralysis. It is a phenomenon in which the sleeper feels the presence of a supernatural, malevolent being which immobilizes the person as if sitting on their chest or the foot of their bed.
The average decibel level of human speech is estimated between 55 and 65 decibels. A whisper is considered the lowest decibel level of human speech. A whisper is between 20-30 dB. On the other hand, a human scream can reach decibel levels between 80 and 125 dB.
During a night terror you may talk and move about but are asleep. It's rare to remember having a night terror. Nightmares are bad dreams you wake up from and can remember. Night terrors are most common in children between the ages of 3 and 8, while nightmares can affect both children and adults.
“You shouldn't wake them up because they'll be disoriented,” Ellis says. “They won't have any recollection of the episode if you don't wake them up.” Nightmares can be echoes of the stressful experiences people are having in their waking hours.
Night terrors in adults usually point to an underlying mental health condition, like post-traumatic stress disorder or anxiety disorder.
Compared to idiopathic nightmares, post-traumatic nightmares tend to be frequent, recurrent, involve mental images related to a traumatic memory, are emotionally intense and are more perceptually vivid (Phelps et al., 2011).
Sleep terrors occur most often in children 1 to 8 years of age. They usually go away by 12 years of age. Night terrors usually occur in the first half of the night (90 minutes to 3 hours after falling asleep). They may also happen at naptime.
Short-term memory areas are active during REM sleep, but those only hang on to memories for about 30 seconds. “You have to wake up from REM sleep, generally, to recall a dream,” Barrett says. If, instead, you pass into the next stage of sleep without rousing, that dream will never enter long-term memory.
Here are some frequently occurring dreams that you should not disregard:
We'll explore 10 common dreams many people have and dissect their possible meanings.
Highlights. Sleep hypopnea is defined as a drop of ≥30% in breathing amplitude and in oxygen saturation >3% (AASMedicine), or >4% (CMMS). This study reveals a systematic bias, with the 3% criterion consistently yielding higher apnea/hypopnea index values.