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Visual snow is a phenomenon where a person perceives visual disturbances, such as fine graininess or "static," in their field of vision. This can occur in low-light conditions, in the dark, or when the visual system amplifies light perception.
An aura is a perceptual disturbance experienced by some with epilepsy or migraine.An epileptic aura is actually a minor seizure. [1]Epileptic and migraine auras are due to the involvement of specific areas of the brain, which are those that determine the symptoms of the aura.
Sound levels as low as 40 dB(A) can generate noise complaints [43] and the lower threshold for noise producing sleep disturbance is 45 dB(A) or lower. [ 44 ] Other factors that affect the annoyance level of sound include beliefs about noise prevention and the importance of the noise source, and annoyance at the cause (i.e., non-noise related ...
“One purpose of my project is separating anthropogenic sounds from the Hum,” he says. ... “It’s not a tinnitus-type noise. It’s a low-frequency pulsating. It’s very pervasive ...
“And the one I see the most is patients who have a pulsating sound in the ear,” often in tune with their heartbeat. ... not just one, and it comes back the next day or the day after,” it’s ...
Artist's depiction of a scintillating scotoma, exhibiting a flashing visual pattern similar to dazzle camouflage used during WWI.. Scintillating scotoma is a common visual aura that was first described by 19th-century physician Hubert Airy (1838–1903).
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The feeling of pulsating pain is not in phase with the pulse. [45] In more than 40% of cases, however, the pain may be bilateral (both sides of the head), and neck pain is commonly associated with it. [46] Bilateral pain is particularly common in those who have migraine without aura. [33]