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Photosensitive epilepsy (PSE) is a form of epilepsy in which seizures are triggered by visual stimuli that form patterns in time or space, such as flashing lights, bold, regular patterns, or regular moving patterns. PSE affects approximately one in 4,000 people (5% of those with epilepsy).
Flicker vertigo, sometimes called the Bucha effect, is "an imbalance in brain-cell activity caused by exposure to low-frequency flickering (or flashing) of a relatively bright light." [ 1 ] It is a disorientation -, vertigo -, and nausea -inducing effect of a strobe light flashing at 1 Hz to 20 Hz, approximately the frequency of human brainwaves .
Sleep deprivation is the second most common trigger of seizures. [15] In some cases, it has been responsible for the only seizure a person ever has. [41] However, the reason for which sleep deprivation can trigger a seizure is unknown. One possible thought is that the amount of sleep one gets affects the amount of electrical activity in one's ...
The term Harding test is generically understood to mean an automatic test for photosensitive epilepsy (PSE), triggered by provocative image sequences in television content. This is properly known as a PSE test since the publication of the Digital Production Partnership (DPP) technical requirements [ 1 ] and the DPP PSE Devices [ 2 ] document ...
According to Apuleius and other ancient physicians, to detect epilepsy, it was common to light a piece of gagates, whose smoke would trigger the seizure. [209] Occasionally a spinning potter's wheel was used, perhaps a reference to photosensitive epilepsy. [210] In most cultures, persons with epilepsy have been stigmatized, shunned, or even ...
Seizures originate in the occipital lobe and account for 5 to 10 percent of all epileptic seizure types. Generally, this type of epilepsy can have an onset anywhere from 1–17 years old in children, but the patient prognosis is good. Since the event is located in the occipital lobe, symptoms may occur spontaneously and include visual stimuli.
There have been cases of epileptic individuals willingly self-inducing ecstatic or pleasurable seizures via exposure to known provoking epileptogenic stimuli, like flickering or flashing television screens. [1] [14] [21] [22] Positive emotions have been reported to be a trigger of ecstatic seizures in some. [3]
People may also experience a flash of light. [5] Pain is typically absent. [2] The cause is unknown. [3] Potential organic explanations that have been investigated but ruled out include ear problems, temporal lobe seizure, nerve dysfunction, or specific genetic changes. [2] Potential risk factors include psychological stress. [2]
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