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Night hag

Night hag is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Night hag rather than just read about it. In short: 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.

Night hag — main illustration
Night hag — illustration

Key takeaways

  • Night hag belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Night hag to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Night hag from memory before moving on to harder problems.

Reference excerpt

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 word "night-mare" or "nightmare" was used to describe this phenomenon before the word received its modern, more general meaning. Various cultures have various names for this phenomenon and supernatural character.

Sleep paralysis

The original definition of sleep paralysis was codified by Samuel Johnson in his A Dictionary of the English Language as nightmare, a term that evolved into our modern definition. Such sleep paralysis was widely considered the work of demons, and more specifically incubi, which were thought to sit on the chests of sleepers. In Old English the name for these beings was mare or mære (from a proto-Germanic *marōn, cf. Old Norse mara), hence comes the mare part in nightmare. The word might be etymologically cognate to Greek Marōn (in the Odyssey) and Sanskrit Māra.

Folklore In Scandinavian folklore, sleep paralysis is caused by a mare, a supernatural creature related to incubi and succubi. The mare is a damned woman, who is cursed and her body is carried mysteriously during sleep and without her noticing. In this state, she visits villagers to sit on their rib cages while they are asleep, causing them to experience nightmares. The Swedish film Marianne examines the folklore surrounding sleep paralysis. Folk belief in Newfoundland in Canada and South Carolina and Georgia in the United States describe the negative figure of the hag who leaves her physical body at night, and sits on the chest of her victim. The victim usually wakes with a feeling of terror, has difficulty breathing because of a perceived heavy invisible weight on his or her chest, and is unable to move i.e., experiences sleep paralysis. This nightmare experience is described as being "hag-ridden" in the Gullah lore. The "Old Hag" was a nightmare spirit in British and also Anglophone North American folklore. In Fiji, the experience is interpreted as kana tevoro, being "eaten" by a demon. In many cases the demon can be the spirit of a recently dead relative who has come back for some unfinished business, or has come to communicate some important news to the living. Often persons sleeping near the afflicted person say kania, kania, "eat! eat!" in an attempt to prolong the possession for a chance to converse with the dead relative or spirit and seek answers as to why he or she has come back. The person waking up from the experience is often asked to immediately curse or chase the spirit of the dead relative, which sometimes involves literally speaking to the spirit and telling him or her to go away or using expletives. In Albanian folk beliefs, Mokthi is believed to be a male spirit with a golden fez hat who appears to women who are usually tired or suffering and stops them from moving. It is believed that if they can take his golden hat, he will grant them a wish, but then he will visit them frequently although he is harmless. There are talismans that can provide protection from Mokthi and one way is to put one's husband's hat near the pillow while sleeping. Mokthi or Makthi in Albanian means "Nightmare". In Nigeria, "ISP appears to be far more common and recurrent among people of African descent than among whites or Nigerian Africans," and is often referred to within African communities as "the Devil on your back." and is called "Dannau" by the Hausa people In Turkey, sleep paralysis is called Karabasan, and is similar to other stories of demonic visitation during sleep. A supernatural being, commonly known as a jinn (cin in Turkish), comes to the victim's room, holds him or her down hard enough not to allow any kind of movement, and starts to strangle the person. To get rid of the demonic creature, one needs to pray to Allah by reading Al-Falaq and Al-Nas from the Qur'an. Moreover, in some derivatives of the stories, the jinn has a wide hat and if the person can show the courage and take its hat, the djinn becomes his slave. In Thailand, it is believed that sleep paralysis and discomfort is caused by a ghost of the Thai folklore known as Phi Am (Thai: ผีอำ). Some people claim that this spirit may even cause bruises. Stories about this spirit are common in Thai comics. In the Southern United States, it is sometimes referred to as "witch riding". In Eastern Chinese folklore, it is thought that a mouse can steal human breath at night. Human breath strengthens the mouse, allowing it longevity and the ability to briefly become human at night, in a similar fashion to fox spirits. The mouse sits near the person's face or under their nostrils.

… excerpt ends here. Continue reading the full article.

Illustrations

Night hag: The Night-Hag Visiting Lapland Witches, 1796
The Night-Hag Visiting Lapland Witches, 1796

Worked examples

Example 1 — a first encounter with Night hag

Start with the simplest possible case. Write down what Night hag claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Night hag before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Night hag ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Night hag

In research
Night hag appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Night hag in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Night hag is common in secondary-school and first-year university syllabi. It links to neighbouring topics Apparitions, Crones and hags, Demons, so understanding it makes those chapters shorter.
In everyday life
Look for Night hag outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Night hag in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Night hag means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Night hag out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Night hag in simple terms?

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.

Why does Night hag matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Night hag?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Night hag.

Tags

  • Apparitions
  • Crones and hags
  • Demons
  • Dreams in religion
  • Ghosts
  • Hallucinations
  • Jinn
  • Monsters
  • Sleep disorders
  • Sleep in mythology and folklore
  • Spirits
  • Supernatural urban legends

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