Tourette's syndrome

8 important questions on Tourette's syndrome

Tourette's Motor tics

  • Simple motor tics
    sudden, fleeting or fragmentary movements (blinking, grimacing, head jerking)
  • complex motor tics
    several simple motor tics occurring in an orchestrated sequence or semi-purposeful movements (touching or tapping)

Tourette's phonic tics

  • simple phonic tics
    simple, unarticulated sounds (throat clearing, sniffing, grunting)
  • complex phonic tics
    out-of-context syllables, words, phrases or paroxysmal changes in prosody

Tourette's complex tics may involve

  • socially inappropriate or obscene gestures (copropraxia) or utterances (coprolalia)
  • echo phenomena such as echolalia or echopraxia (repeating others movements)
  • self-injurious tics such s cheek chewing, eye poking, or self hitting
  • tics can be exacerbated by stress, fatigue and external stimuli
  • intentional movements can attenuate tic occurence and concentration in activities tend to dissipate symptoms
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Tourette's premonitary urges

  • uncomfortable bodily sensations prior to tics, and are temporarily relieved or reduced following tics
  • discomfort from these urges can cause more dustress than the tics themselves
  • >90% of adults with tourette's are aware of the urges (less in children and adolescents)

Tourette's Rage attacks

  • in outbursts - Premonitary urges -> relief -> remorse
  • studies suggest that rage attacks are positively correlated with triad of TS, ADHD, OCD
  • ADHD and OCD may represent a similar disorder of inhibition
  • Prevalence of ADHD in TS is 55%

Tourette's diagnosis and treatment

  • Many patients with TS are undiagnosed
  • potential long-term concequences of failed or delayed identification (e.g. behavioural problems)
  • diagnosis after consulation of 2-3 professionals (range 1-16)
  • delay from aonset of tics until diagnosis about 3 years
  • due to a lack of knowledge and delay of initiation of necessary support

Tourette's habit reversal therapy

  • teaching the patient to become aware off the premonitary urge preceding a tic, recognizing it, and developing a competing response incompatible with performing the tic

Tourette's Hayling sentence completion task

  • sensitive to TS and deficits of TS patients (without comorbidity)
  • measure of response inhibition
  • two sets of 15 sentences with the last word missing
  • sentences strongly cue a particular word
  • 1st part - complete the sentences logically
    2nd part - complete the sentences with a nonsensical ending word
  • increased number of errors in patients with TS for the nonsensical endings
  • verbal inhibition is impaired in patients with TS
  • could impair performance in other tasks

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