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Inhibitory control and voluntary tic suppression.

Simon Morand-Beaulieu1

  • 1Department of Psychology, McGill University, Montréal, QC, Canada; Department of Psychology, Université du Québec à Montréal, Montréal, QC, Canada.

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Summary

Individuals with Tourette syndrome (TS) can voluntarily suppress tics, a unique ability differentiating it from other movement disorders. Research on inhibitory control in TS shows mixed results, and the mechanisms of tic suppression require further understanding.

Keywords:
Action inhibitionInhibitory controlResponse inhibitionStoppingTicsTourette syndromeVoluntary tic suppression

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Area of Science:

  • Neuroscience
  • Movement Disorders
  • Psychiatry

Background:

  • Tics are involuntary movements/vocalizations characteristic of Tourette syndrome (TS).
  • Voluntary tic suppression is a key feature of TS, allowing brief control over tics.
  • Existing research on inhibitory control and response inhibition in TS has yielded inconsistent findings.

Purpose of the Study:

  • To review evidence on inhibitory control of voluntary actions in TS.
  • To explore the mechanisms underlying voluntary tic suppression in Tourette syndrome.
  • To compare inhibitory control and tic suppression processes in TS.

Main Methods:

  • Review of clinical studies.
  • Analysis of behavioral and neuropsychological data.
  • Examination of neurobiologic evidence.

Main Results:

  • Inhibitory control studies in TS have produced mixed results.
  • Mechanisms of voluntary tic suppression in Tourette syndrome are not well understood.
  • The relationship between inhibitory control and voluntary tic suppression requires further investigation.

Conclusions:

  • Further research is needed to clarify the mechanisms of voluntary tic suppression in TS.
  • Understanding inhibitory control may offer insights into tic expression and suppression.
  • Distinguishing TS from other movement disorders relies on understanding these unique control capacities.