Disease Description (Causes and Symptoms)
- Definition summary: Tourette syndrome is a neurodevelopmental disorder in which repetitive and involuntary motor tics (e.g., eye blinking and sudden movements of the face and neck) and vocal tics (e.g., coughing sounds, sniffing, and sometimes swearing) persist simultaneously or alternately for more than 1 year. It usually begins in childhood.
- Main causes and pathophysiology:
- Genetic predisposition (high heritability shown in family history and twin studies) and environmental factors (stress, infection, brain injury related to childbirth, etc.) are involved in combination.
- Imbalances in neurotransmitters such as dopamine in the central nervous system and dysfunction of the cortico-striato-thalamo-cortical circuit (CSTC circuit) are known to be involved.
- Main symptoms:
- Motor tics: eye blinking, facial grimacing, shoulder shrugging, sudden movements of the arms or legs, etc.
- Vocal tics: making vocal sounds, sniffing, uttering syllables, and rarely swearing (obscene words; coprolalia).
- Characteristics of tics: repetitive and involuntary; symptoms repeatedly worsen and improve; they tend to worsen with emotional changes, fatigue, and stress.
- Epidemiology:
- Average age of onset is around 7 years; boys are approximately three times more commonly affected than girls.
- Prevalence: approximately 4–5 per 10,000 people (0.04–0.05%) (varies by report).
- Comorbidities: ADHD, obsessive-compulsive disorder (OCD), learning disabilities, anxiety and depressive disorders, and sleep disorders frequently occur together.
Treatment Methods, Precautions, and Complications
- Non-pharmacological treatment
- Behavioral therapy: CBIT (Comprehensive Behavioral Intervention for Tics) or Habit Reversal Therapy (HRT) is the first-line recommended treatment (especially for mild to moderate cases).
- Education and environmental modification: Avoid excessive attention to tics and reduce stress, lack of sleep, and excessive demands.
- Support for school adjustment (understanding and observation by educators and family, with academic support when necessary).
- Pharmacological treatment
- Antipsychotics (dopamine antagonists): haloperidol and pimozide — effective for tics but may cause side effects such as extrapyramidal symptoms and sedation.
- Atypical antipsychotics: risperidone, etc. — consider the efficacy and side-effect profile.
- Dopamine-depleting agent: tetrabenazine (used in some countries or situations) — caution is required regarding depression and parkinsonism.
- α2-adrenergic agonists: clonidine and guanfacine — particularly considered when ADHD is also present; may cause side effects such as sedation and hypotension.
- Medication selection is individualized according to symptom severity, comorbidities, and the risk of side effects.
- Procedures and surgery
- Neurosurgical treatments such as deep brain stimulation (DBS) may be considered only in extreme cases refractory to medication and psychotherapy (strict evaluation of indications is required at a specialized center).
- Precautions (including self-management)
- Do not scold or punish the child (tics are not behaviors that can be controlled by willpower).
- Get sufficient sleep, manage stress, and maintain a regular routine.
- When taking medication, monitor for side effects (sedation, weight gain, extrapyramidal symptoms, depressed mood, etc.) and consult a doctor.
- Complications and effects
- Functional impairment due to social stigma and bullying, difficulties in academic or occupational settings, self-injurious tics (in severe cases), and comorbid psychiatric conditions.
- Rarely, trauma (injuries caused by movements) or worsening psychological problems.
Outpatient Visit Checklist (Including Preparation Items and Example Questions)
- Items to prepare (recommended to bring)
- A list of all medications and supplements currently being taken (including dosage and dosing times).
- Videos recording the symptoms (very useful when tics do not occur frequently and are difficult for the doctor to observe).
- A timeline documenting when symptoms began and their course (frequency, triggers, and factors that worsen or improve them).
- Family history (including tics and psychiatric history), past medical history, and information related to birth history.
- School observation materials (teacher opinions, impact on academic performance, etc.) or previous test results (neurological examinations, psychiatric evaluations, etc.).
- Items to briefly write down for the outpatient visit (preparing for the medical interview)
- Types of tics (motor/vocal), frequency, duration, and premonitory sensations (such as pressure or an urge).
- Triggers and aggravating factors for tics (stress, fatigue, and specific situations).
- The degree of impact on daily life, academics, and social relationships.
- Treatments previously attempted (medications, therapies, and folk remedies) and their effects and side effects.
Examples of General Questions to Ask the Doctor
- "What is the recommended first-line treatment for the current symptoms? Which would you recommend trying first, medication or behavioral therapy?"
- "What are the main side effects of the medication you plan to prescribe, and in what situations should I contact you immediately?"
- "What support should parents and teachers provide to reduce the child's school-related and social stress?"
- "What is the long-term prognosis, and how likely are the symptoms to improve in adulthood?"
Examples of Disease-Specific Questions
- "If there are similar symptoms in our family, how high is the risk of passing them on to our children? Is genetic counseling necessary?"
- "When tics are severe, are there any recommendations or restrictions regarding driving, operating dangerous machinery, or participating in sports?"
- (For child patients) "If comorbidities such as ADHD or obsessive-compulsive disorder are suspected, what should be evaluated and managed first?"