Cataplexy brought on by playing checkers.
A 55-year-old man had experienced spells of weakness and trembling daily for 24 years before the correct diagnosis of cataplexy was reached. While the patient played checkers, the degree of cataplexy worsened when it was the patient's move and improved when it was his opponent's. Response to therapy was excellent.
D002385:Cataplexy / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D004569:Electroencephalography; D006801:Humans; D008297:Male; D008875:Middle Aged; D010988:Play and Playthings