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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]
A head shake is a gesture in which the head is turned left and right along the transverse plane repeatedly in quick succession. In many cultures, it is most commonly, [1] but not universally, used to indicate disagreement, denial, or rejection. It can also signify disapproval or upset at a situation, often with slower movement.
Rhythmic movement disorder (RMD) is a neurological disorder characterized by repetitive movements of large muscle groups immediately before and during sleep often involving the head and neck. It was independently described first in 1905 by Zappert as jactatio capitis nocturna and by Cruchet as rhythmie du sommeil . [ 1 ]
In animals, including humans, the startle response is a largely unconscious defensive response to sudden or threatening stimuli, such as sudden noise or sharp movement, and is associated with negative affect. [1] Usually the onset of the startle response is a startle reflex reaction.
Practicing mindfulness is the most effective antidote to mental noise, experts tell Fortune. Try a simple 60-second breathing exercise: inhale for four counts, hold for four counts, and exhale for ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 14 January 2025. This is a list of onomatopoeias, i.e. words that imitate, resemble, or suggest the source of the sound that they describe. For more information, see the linked articles. Human vocal sounds Achoo, Atishoo, the sound of a sneeze Ahem, a sound made to clear the throat or to draw attention ...
In the case of bobble-head doll syndrome, the disturbance is related to those structures proximal to the third ventricle. [3] More research is being conducted in order to find the neurophysiologic basis for bobble-head doll syndrome and its connection with other movement disorders, but with the rare occurrence of the disorder, progress is slow. [7]
It uses four boxes at different frequencies, all calibrated to generate a sound pressure level (loudness) of sixty decibels at two metres. The test can be used to screen the hearing of children aged from six to 24 months. The tester knocks down the boxes out of sight of the child. If the child hears the sound, they will turn their head towards it.