ElectroDiagnostic Centre, Greenfields, Pershore Road, Upton Snodsbury, Worcester WR7 4NR, United Kingdom.
Appl Ergon. 2010 Jul;41(4):504-8. doi: 10.1016/j.apergo.2008.08.005. Epub 2008 Oct 17.
Photosensitive epilepsy came to prominence in the 1950s with the advent of television. Photosensitive epilepsy occurs in 1 in 4000 of the population. The incidence is 1.1 per 100,000 per annum, however amongst 7-19 year-olds the incidence is more than five times as common. Photosensitive epilepsy is twice as common in females as in males. The onset is around puberty, but less than 25 per cent of patients lose their photosensitivity in their twenties. Patients are investigated in the EEG laboratory using intermittent photic stimulation. Peak sensitivity is between 16 and 20 flashes/s but 49 per cent of patients are sensitive to 50 flashes/s, explaining the sensitivity to PAL television systems. From 1993 the development of broadcast guidelines was developed restricting both flash rates and the areas of screen involved, as well as the use of long-wavelength red. Automatic analysis systems can now test material for compliance with guidelines in real time.
光敏性癫痫在 20 世纪 50 年代随着电视的出现而受到关注。光敏性癫痫在人群中的发病率为 1/4000。发病率为每年每 10 万人中有 1.1 例，但在 7-19 岁人群中，发病率是其五倍以上。光敏性癫痫在女性中的发病率是男性的两倍。发病时间在青春期左右，但不到 25%的患者在 20 多岁时失去光敏性。患者在脑电图实验室中使用间歇性闪光刺激进行检查。峰值敏感度在 16 到 20 闪烁/秒之间，但 49%的患者对 50 闪烁/秒敏感，这解释了对 PAL 电视系统的敏感性。自 1993 年以来，制定了广播指南，限制了闪烁频率和屏幕涉及的区域，以及使用长波长红光。现在，自动分析系统可以实时测试材料是否符合指南。
