“…The latter is often termed as delayed neuropsychiatric sequela in CO intoxication. The lucid interval after acute CO poisoning, on average, is around 20 days, varying from one to 240 days (Choi 1983;Lee and Marsden 1994;Ernst and Zibrak 1998;Pavese, Napolitano et al 1999;Hsiao, Kuo et al 2004), with a prevalence of 0.2-40% (Hsiao, Kuo et al 2004;Otubo, Shirakawa et al 2007). Delayed neuropsychiatric sequelae include parkinsonism (Lee and Marsden 1994), chorea (Park and Choi 2004), akinetic mutism (Lee and Marsden 1994), increased irritability, verbal aggressiveness, violence, impulsiveness (Meredith and Vale 1988), mood disorders (Weaver 2009), dementia (Meredith and Vale 1988;Ernst and Zibrak 1998;Weaver 2009), psychosis (Ernst and Zibrak 1998), sleep disturbances (Weaver 2009), cortical blindness (Quattrocolo, Leotta et al 1987;Senol, Yildiz et al 2009) and incontinence (Ernst and Zibrak 1998).…”