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Exploding head syndrome (EHS) is an abnormal sensory perception during sleep in which a person experiences auditory hallucinations that are loud and of short duration when falling asleep or waking up. [2] [4] The noise may be frightening, typically occurs only occasionally, and is not a serious health concern. [2]
Hypnagogic hallucinations are often auditory or have an auditory component. Like the visuals, hypnagogic sounds vary in intensity from faint impressions to loud noises, like knocking and crashes and bangs (exploding head syndrome). People may imagine their own name called, crumpling bags, white noise, or a doorbell ringing.
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Going to bed before the usual hour is a frequent cause of night-mare, as it either occasions the patient to sleep too long or to lie long awake in the night. Passing a whole night or part of a night without rest likewise gives birth to the disease, as it occasions the patient, on the succeeding night, to sleep too soundly.
They should try eating something sugary and lying down or sitting and reducing the elevation of the head relative to the body (for example, by positioning the head between the knees). Other simple remedies include avoiding sudden changes in posture when sitting or lying and avoiding bright lights.
Further research into crackling noise was done in the late 1940s by Charles Francis Richter and Beno Gutenberg who examined earthquakes analytically. Before the invention of the well-known Richter scale, the Mercalli intensity scale was used; this is a subjective measurement of how damaging an earthquake was to property, i.e. II would be small vibrations and objects moving, while XII would be ...
Chronic RBD is idiopathic, meaning of unknown origin, or associated with neurological disorders. [22] There is a growing association of chronic RBD with neurodegenerative disorders— Parkinson's disease , multiple system atrophy (MSA), or dementia—as an early indicator of these conditions by as much as 10 years.
The name penanggalan derives from the word tanggal, meaning "to remove or take off", because its form is that of a floating disembodied woman's head, with its organs and entrails trailing from its neck. Though commonly referred to in its native languages as a ghost, the penanggalan cannot be readily classified as a classical undead being.