The Old hag is the name given to a supernatural creature, used to explain the phenomenon of sleep paralysis. It is a phenomenon during which a person feels a presence of a supernatural malevolent being which immobilizes the person as if sitting on his/her chest or the foot of his/her bed.
Hypnagogia is the experience of the transitional state between wakefulness and sleep in humans: the hypnagogic state of consciousness, during the onset of sleep. Mental phenomena that occur during this “threshold consciousness” phase include lucid thought, lucid dreaming, hallucinations, and sleep paralysis.
Can You Die from Sleep Paralysis? Although sleep paralysis can result in high levels of anxiety, it isn't generally considered life-threatening. While more research is needed on the long-term effects, episodes usually only last between a few seconds and a few minutes.
Voices as you fall asleep or wake up – these are to do with your brain being partly in a dreaming state. The voice might call your name or say something brief. You might also see strange things or misinterpret things you can see. These experiences usually stop as soon as you are fully awake.
Many adults who experience night terrors live with mood-related mental health conditions, such as depression, anxiety, or bipolar disorder. Night terrors have also been associated with the experience of trauma and heavy or long-term stress.
This weird state of consciousness is characterized by brief bursts of sleep that happen while a person is awake — often while their eyes are open and they're either sitting upright, or even performing a task. During microsleep, parts of the brain go offline for a few seconds while the rest of the brain stays awake.
During REM sleep, our brain is almost as active as it is when we are awake. In this phase of sleep, breathing can become fast and irregular. REM sleep is thought to help consolidate memories.
The sleep demon is actually a hallucination linked to sleep paralysis, which occurs when a person is jolted awake in the middle of the rapid eye movement (REM) phase of sleep associated with dreaming. You wake up but your brain is still dreaming — and it's projecting your nightmares into the real world.
If your hypnagogic hallucinations are caused by anxiety, your doctor may recommend psychiatric treatment. Treatment for anxiety could involve talk therapy, meditation, or medication, as well as other at-home care to reduce stress.
It is more common in teenagers and young adults, and women experience them more than men. Sleep paralysis can accompany these hallucinations and people may also experience hypnagogic jerks along with dreams, exploding head syndrome symptoms like bright lights or loud sounds, or sensations of falling.
Other symptoms
During a hypnagogic hallucination, a person knows that they are awake. The images, sounds, or other sensations may last a number of minutes. They may prevent a person from falling asleep. These hallucinations may happen at the same time as sleep paralysis.So-called hypnagogic hallucinations occur during the transition from wakefulness to sleep (just after our head hits the pillow). And hypnopompic hallucinations hit during the waking-up process. Bugs or animals crawling on the walls are a common vision, said Neil Kline, a sleep physician and representative of the ASA.
Hypnagogic hallucinations are vivid visual, auditory, tactile, or even kinetic perceptions that, like sleep paralysis, occur during the transitions between wakefulness and REM sleep. Examples include a sensation of impending threat, feelings of suffocation, and sensations of floating, spinning, or falling.
Neuroscientists are into sleep deprivation in the same way they're into psychedelics. But like psychosis, both psychedelics and sleep deprivation can cause hallucinations, so functional studies of the brain in any of these states can hint at the neural processes that contribute to the susceptibility to hallucinate.
It is a phenomenon during which a person feels a presence of a supernatural malevolent being which immobilizes the person as if sitting on their chest or the foot of their bed. The word "night-mare" or "nightmare" was used to describe this phenomenon before the word received its modern, more general meaning.
So-called hypnagogic hallucinations occur during the transition from wakefulness to sleep (just after our head hits the pillow). And hypnopompic hallucinations hit during the waking-up process. People report hearing voices, feeling phantom sensations and seeing people or strange objects in their rooms.
If you think you're seeing — or smelling, hearing, tasting, or feeling — things when you're asleep, you may not be dreaming. It's possible you're experiencing hypnagogic hallucinations. These can occur in the consciousness state between waking and sleeping. As a result, these hallucinations often cause fear.
Charles Bonnet syndrome (CBS) is a common condition among people who've lost their sight. It causes people who have lost a lot of vision to see things that aren't really there – medically known as having a hallucination.
In cases of severe hypnagogic hallucinations, people have been known to jump out of bed and accidentally injure themselves. People may also cause themselves harm if they have a hallucination that bugs are crawling on them. So it's important to seek treatment if your hallucinations are severe.
Using a telephone survey with the Sleep-EVAL system in the United Kingdom, Germany, and Italy, Ohayon and colleagues reported an overall prevalence of any type of hallucination at 38.7%, but when divided into subgroups, prevalence was 18% for hypnagogic and 4.9% for hypnopompic hallucinations.
So-called hypnagogic hallucinations occur during the transition from wakefulness to sleep (just after our head hits the pillow). And hypnopompic hallucinations hit during the waking-up process. People report hearing voices, feeling phantom sensations and seeing people or strange objects in their rooms.
What causes hypnagogic hallucinations?
- alcohol or drug use.
- insomnia.
- anxiety.
- stress.
- narcolepsy.
- mood disorders such as bipolar disorder or depression.
The hypnopompic state (or hypnopompia) is the state of consciousness leading out of sleep, a term coined by the psychical researcher Frederic Myers. Its mirror is the hypnagogic state at sleep onset; though often conflated, the two states are not identical.
Hypnagogia, also referred to as "hypnagogic hallucinations", is the experience of the transitional state from wakefulness to sleep: the hypnagogic state of consciousness, during the onset of sleep (for the transitional state from sleep to wakefulness see hypnopompic).
If you think you're seeing — or smelling, hearing, tasting, or feeling — things when you're asleep, you may not be dreaming. It's possible you're experiencing hypnagogic hallucinations. These can occur in the consciousness state between waking and sleeping. Hypnagogic hallucinations often cause confusion.
Hallucinations may share greater underlying mechanisms with hypnagogic experiences (which more closely reflect REM intrusions into waking state than dreams) given that external stimuli continue to be processed and reacted to during NREM sleep, albeit intermittently.
Threshold consciousness (commonly called "half-asleep" or "half-awake", or "mind awake body asleep") describes the same mental state of someone who is moving towards sleep or wakefulness, but has not yet completed the transition.
Sleep paralysis is rare. But it can be scary if the person doesn't know what's happening: Someone with sleep paralysis temporarily loses the ability to speak or move while falling asleep or waking up. This sensation can last for seconds or even a couple of minutes. Some people may also have hallucinations.
If you think you're seeing — or smelling, hearing, tasting, or feeling — things when you're asleep, you may not be dreaming. It's possible you're experiencing hypnagogic hallucinations. These can occur in the consciousness state between waking and sleeping. As a result, these hallucinations often cause fear.
According to study leader Daniel Kay — a psychology professor at Brigham Young University in Provo, UT — the reason behind why scientists have been missing out on the explanation for this phenomenon is that, traditionally, sleep is understood as a categorical experience: you're either asleep or you're not, and when you
Many cases of narcolepsy are thought to be caused by a lack of a brain chemical called hypocretin (also known as orexin), which regulates sleep. The deficiency is thought to be the result of the immune system mistakenly attacking parts of the brain that produce hypocretin.
