Pathologic laughing as a presenting feature in a patient with neuromyelitis optica. Ahn S-W, Kim J-M, Park K-Y, Kwon O-S, Youn Y-C J Neuropsychiatry Clin Neurosci. 2014 Apr 1; 26(2):E58-9. PMID: 24763798. Abstract CommentRecommendBookmarkWatch