The ancient folklore of the mare explains the terrifying sensation of sleep paralysis.
In short: For centuries, Germanic and Slavic cultures feared the mare, a malicious entity said to sit on the chests of sleeping victims. This nocturnal visitor, capable of shapeshifting into animals or insects, left people breathless and drenched in sweat. Today, we recognize these accounts as early explanations for sleep paralysis.
The term mare, derived from the Proto-Germanic *marōn, is linked to the Proto-Indo-European root *mer-, signifying crushing or oppression. Across Europe, folklore describes this entity as a supernatural force that haunts the night. In Scandinavia, it was often depicted as a beautiful woman or an older lady who rode the chests of both humans and animals, leaving them exhausted. Slavic traditions, such as the Polish zmora or the Croatian mora, similarly describe a spirit that tortures sleepers, sometimes even draining their blood or energy.
The mare was believed to be a shapeshifter, taking the form of cats, dogs, birds, or even insects like moths and mosquitoes to enter homes through tiny cracks or keyholes. Legends often provided specific, sometimes bizarre, methods to ward off these entities. Protective rituals included placing a broom or axe crosswise on a threshold, hanging mirrors over mangers, or leaving upside-down slippers by the bed. Some tales even suggest that if a mare was captured by plugging her entry point, she could be forced into servitude or transformed into a horse and ridden until death.
Beyond human victims, the mare’s influence was thought to extend to the natural world. Entangled hair, known as marelocks, or twisted, stunted pine trees were attributed to the creature's nocturnal activities. Scholars note that these beliefs likely originated as folk explanations for physical phenomena, such as the 'Polish plait' hair disease or the physiological experience of sleep paralysis. While some philologists like Éva Pócs suggest connections to the Greek concept of doom, the core of the myth remains a visceral, cultural attempt to rationalize the terrifying, suffocating helplessness of a dream-state attack.
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Sources
- Summary by Intellect · source: Mare (folklore)
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