title: Digit and letter alexia in carbon monoxide poisoning.
abstract: This study examined a 24-year-old patient with delayed encephalopathy, who was admitted to hospital with complaints of headache and visual impairment 1 week after acute carbon monoxide poisoning. The results of a visual field assessment, electroencephalography and head magnetic resonance imaging indicated damage to the cerebral cortex. After a 2-week treatment period, the patient had recovered from the visual impairment, but exhibited digit- and letter-reading difficulty. The Chinese aphasia battery and the number and letter battery supplement were conducted. The results revealed that the patient exhibited digit and letter alexia, while the ability to read Chinese characters was preserved. In contrast, the patient exhibited a deficit in Chinese character writing, while number and letter writing remained intact. Following treatment, reading and writing ability was improved and electroencephalographic abnormalities were ameliorated. Overall, our experimental findings demonstrated that delayed encephalopathy following acute carbon monoxide poisoning was characterized by digit and letter alexia.
authors: Department of Neurology, Zengcheng People's Hospital, Zengcheng 511300, Guangdong Province, China.
authors: Qingyu
authors: Q
authors: Shen
authors: Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China.
authors: Xiaoming
authors: X
authors: Rong
authors: Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China.
authors: Rui
authors: R
authors: Pan
authors: Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China.
authors: Ying
authors: Y
authors: Peng
authors: Department of Ophthalmology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China.
authors: Wei
authors: W
authors: Peng
authors: Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China.
authors: Yamei
authors: Y
authors: Tang
keywords: carbon monoxide; delayed encephalopathy; digit alexia; letter alexia; neural regeneration; poisoning
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