A tic is a repeated, impulsive action, reflexive in
nature, which the actor feels powerless to control or
avoid. Only when the individual performs the tic, is
tension and anxiety released within the individual with
a tic disorder. Tics can be triggered by an emotional
state or sensation, or can happen for no obvious
reason. General types of tics include verbal tics, facial
tics, and other muscular tics. Physical and
psychological therapy and medication can cause tics
to go away, often permanently. Muscular tics look
something like twitches or quick grimaces, and often
affect the eyes and hands. Muscular tics can affect
multiple muscles at once. Some forms of stuttering
are caused by muscular tics in the throat, tongue, or
vocal cords when speaking or preparing to speak.
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