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Related Experiment Video

Updated: Feb 5, 2026

Generating Acute and Chronic Experimental Models of Motor Tic Expression in Rats
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Secondary tics: Etiology, presentation, and management.

José Fidel Baizabal-Carvallo1, Joseph Jankovic2

  • 1Parkinson Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, TX, United States; Department of Sciences and Engineering, University of Guanajuato, León, Mexico.

Handbook of Clinical Neurology
|February 3, 2026
PubMed
Summary
This summary is machine-generated.

Secondary tic syndromes (STS) present with involuntary movements and sounds, distinct from Tourette syndrome (TS). Early recognition and tailored treatments, including specific therapies beyond standard pharmacologic approaches, are crucial for managing these diverse tic disorders.

Keywords:
DegenerativeDrug-inducedEncephalitisHuntington diseaseMonoxide intoxicationSecondarySydenham choreaTicsTourette syndromeTrauma

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Area of Science:

  • Neurology
  • Movement Disorders
  • Neuropsychiatry

Background:

  • Tics are involuntary movements or sounds, with Tourette syndrome (TS) being the most common cause.
  • Secondary tic syndromes (STS) encompass a range of disorders presenting with tic-like movements, stemming from diverse etiologies.
  • Understanding the distinctions and overlaps between TS and STS is critical for accurate diagnosis and management.

Purpose of the Study:

  • To differentiate secondary tic syndromes (STS) from Tourette syndrome (TS).
  • To outline the varied etiologies and clinical features associated with STS.
  • To emphasize the importance of prompt recognition and targeted treatment for favorable outcomes in STS.

Main Methods:

  • Review of existing literature on tic disorders, focusing on secondary causes.
  • Comparative analysis of clinical features, onset, and comorbidities in TS versus STS.
  • Discussion of diagnostic considerations and treatment strategies for STS.

Main Results:

  • Secondary tic syndromes (STS) arise from diverse causes including hereditary factors, drug exposure, toxins, trauma, cerebrovascular events, infections, autoimmune conditions, and functional disorders.
  • Typical features suggesting STS over TS include late age of onset (>18 years), absence of common comorbidities (ADHD, OCD), and no family history of tics.
  • Atypical neurological signs like additional movement disorders, seizures, or altered consciousness temporally linked to an event raise suspicion for STS, which may present with less severe and complex tics than TS.

Conclusions:

  • Secondary tic syndromes (STS) require careful evaluation due to their varied origins and potential for atypical presentations.
  • While sharing some features with Tourette syndrome (TS), STS may exhibit distinct characteristics and necessitate specific treatments.
  • Prompt diagnosis and intervention, including targeted therapies, are essential for improving outcomes in patients with secondary tic syndromes.