involves uncontrollable repetitive movements or unwanted sounds (tics), such as repeatedly blinking the eyes, shrugging shoulders, or blurting out offensive words. People may experience compulsive behaviour, impulsivity, hyperactivity, meaningless repetition of own words, nonsense word repetition, repetitive movements, swearing uncontrollably, or lack of restraint, tics, difficulty with bodily movements, increased muscle activity, involuntary movements, involuntary muscle contraction, or jerking muscle spasms, anxiety or apprehension, cough, eye twitching, learning disability, repetitive blinking of eyes, stuttering, or throat clearing.