deletions | additions       diff --git a/Pharmacological_studies.md b/Pharmacological_studies.md  index 4b0c61f..515215b 100644  --- a/Pharmacological_studies.md  +++ b/Pharmacological_studies.md 
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Thresholds for externally applied sensory stimuli were similar in adults with "pure" TS and controls \cite{26818628}. These results, like those of a previous study \cite{22038938}, demonstrate that the sensory symptoms of TS are central in origin, suggesting abnormalities in interoceptive awareness or central sensorimotor processing.  Interesting study: "The results suggest that tic-like movements do not occur as a consequence of a failure to inhibit motor output. Instead, tics might be considered highly overlearned behavior that can be triggered without interference by external, incompatible movement stimuli" \cite{27062184} \cite{27062184}. Compare \cite{20535824} and \cite{22278950}.  | **Title** | **Comment** |  |:----------|:------------|