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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 .
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]
The condition, which occurs due to a portion of the skull being misshapen or too small, can cause symptoms like headaches, dizziness and vertigo, weak muscles, difficulty with balance or ...
Epileptic auras are subjective sensory or psychic phenomena due to a focal seizure, i.e. a seizure that originates from that area of the brain responsible for the function which then expresses itself with the symptoms of the aura. It is important because it makes it clear where the alteration causing the seizure is located.
The seizures are brief (3–6 s), and occur mainly and immediately after closing of the eyes (eye closure) and consistently many times a day. All patients are photosensitive. Generalised tonic-clonic seizures , either induced by lights or spontaneous, are probably inevitable in the long term and are provoked particularly by precipitating ...
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