Kevin J. Black try again  almost 7 years ago

Commit id: b45ddcc8e9f4ceb80ff073bd9252d599d52967d9

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Many patients with TS describe sensory symptoms preceding or independent of their tics. One group recently took a new approach to studying sensation in TS based on a Theory of Event Coding \cite{27544346}. Their results suggested that details or features of percepts are less integrated in TS; this finding applied to the group as a whole rather than relating to any obvious symptom or demographic characteristic. The authors speculate as to the possible underlying neurobiology.  ### Premonitory urges  Premonitory urges are usually reported later in life than tics are first observed. However, a large case series ($N>1000$) (\[N>1000\])  from one clinic suggests that premonitory urges “emerge much earlier than previously thought”: by age 8-10, >60% of children reported premonitory urges, and >75% could suppress tics \cite{27672357}. Urges also “were found to be highly associated with ‘not just right experiences’.” \cite{Brandt_2016} performed a clever experiment to investigate the timing of urges in relation to tics, compulsions and blinks. Another group examined tics and urge to tic at 10- to 15-second intervals in 12 patients with moderate to severe TS; different patients had quite different relationships between urge and tic timing when examined at this temporal scale \cite{26255052}.