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 | | Coprolalia, a complex vocal tic involving the uttering of obscenities, is present in up to a third of cases. |
 | | In approximately half the cases, the first symptoms to appear are bouts of a single tic, most frequently eye-blinking, less frequently tics involving another part of the face or the body. |
 | | There may be other symptoms, such as mental coprolalia (sudden, intrusive, senseless thoughts of socially unacceptable or obscene words, phrases, or sentences that differ from true obsessions in that no attempt is made to ignore, suppress, or neutralize the thoughts), obsessions, and compulsions. |
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