Tic disorders

Description

Disorders characterized by brief, sudden, repetitive movements (motor tics) or utterances (phonic or vocal tics) that are temporarily suppressible and are usually preceded by a strong urge to perform the tic. The most common cause of childhood-onset tics is Tourette Syndrome. [1]

Subcategories

• 8A05.0 Primary tics or tic disorders

  Primary tics or tic disorders are characterised by the presence of chronic motor and/or vocal (phonic) tics. Motor and vocal tics are defined as sudden, rapid, non-rhythmic, and recurrent movements or vocalizations, respectively. In order to be diagnosed, tics must have been present for at least one year, although they may not manifest consistently. [1]

• 8A05.1 Secondary tics or tic disorders

  A tic disorder as a direct physiologic consequence of an antecedent infection, drugs or illness. [1]

References

1. World Health Organization. International Classification of Diseases, 11th Revision, for Mortality and Morbidity Statistics (ICD-11 MMS), 2026-01 release. World Health Organization; 2026.

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