Tics are sudden, rapid, repetitive movements or vocalisations that a child cannot fully control. Tourette syndrome (TS) involves multiple motor tics and at least one vocal tic for over a year. A critical point: 50-60% of children with TS also have ADHD.
Neurodevelopment
Tics and Tourette syndrome: when the body does what the brain doesn't command
Types of tics: motor, vocal and the limits of TS
| Type | Examples | Diagnosis |
|---|---|---|
| Simple motor tics | Eye blinking, grimacing, head jerking, nose wrinkling | Provisional tic disorder if <1 year |
| Simple vocal tics | Throat clearing, "hmm", "ahh" | Persistent vocal tic disorder |
| Tourette syndrome | Multiple motor tics + ≥1 vocal tic >1 year, onset <18 years | Clinical diagnosis (DSM-5) |
Myth to debunk: Coprolalia (involuntarily saying obscene words) is the most well-known TS symptom but affects only ~10% of patients.
ADHD and tics: the most frequent comorbidity
- Treatment impact: Stimulants for ADHD may — in some cases — exacerbate tics. Current guidelines indicate methylphenidate is generally effective and not contraindicated when ADHD is significant, but monitoring is needed.
- Alternatives: Atomoxetine and guanfacine don't exacerbate tics and may reduce them.
- Treatment priority: Usually ADHD impacts functioning more than tics and is treated first.
Treatment: when to treat and how?
Treat when tics cause significant distress to the child or interfere with social, academic or emotional functioning.
CBIT (Comprehensive Behavioral Intervention for Tics): First-line psychosocial treatment. Includes Habit Reversal Training (substituting the tic with an incompatible movement) and relaxation techniques. Evidence: equivalent or superior effect to medication in many patients.
Pharmacology: Guanfacine or clonidine (first line; also effective for associated ADHD). Aripiprazole or risperidone if insufficient.
Frequently asked questions
In most cases, yes. The typical trajectory worsens around ages 10-12 and improves progressively in adolescence. About 80% see significant reduction in adulthood.
Worry when: tics cause emotional distress, there's mockery or bullying at school, they significantly interfere with activities, or they're accompanied by other symptoms (OCD, ADHD, anxiety).
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