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Individuals with exploding head syndrome hear or experience loud imagined noises as they are falling asleep or are waking up, have a strong, often frightened emotional reaction to the sound, and do not report significant pain; around 10% of people also experience visual disturbances like perceiving visual static, lightning, or flashes of light.
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 ...
A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
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In behavioural terms, microsleeps may manifest as droopy eyes, slow eyelid-closure, and head nodding. [2] In electrical terms, microsleeps are often classified as a shift in electroencephalography (EEG) during which 4–7 Hz ( theta wave ) activity replaces the waking 8–13 Hz ( alpha wave ) background rhythm.
Exploding head syndrome 327.49 G47.59 Sleep-related hallucinations 368.16 R29.81 Sleep-related eating disorder 327.49 G47.59 Parasomnia, unspecified 227.40 G47.50 Parasomnia due to a drug or substance 292.85 G47.54 Parasomnia due to a medical condition 327.44 G47.54 Sleep-Related Movement Disorders:
784 Symptoms involving head and neck. 784.0 Headache; 784.1 Throat pain; 784.2 Swelling mass or lump in head and neck; 784.3 Aphasia; 784.4 Voice disturbance 784.41 Aphonia; 784.49 Hoarseness; 784.5 Dysarthria; 784.6 Other symbolic dysfunction. 784.60 Symbolic dysfunction, unspecified; 784.61 Alexia and dyslexia; 784.7 Epistaxis; 784.8 ...
Catathrenia or nocturnal groaning is a sleep-related breathing disorder, consisting of end-inspiratory apnea (breath holding) and expiratory groaning during sleep.It describes a rare condition characterized by monotonous, irregular groans while sleeping. [1]