Tourette disorder vs OCD and other tic disorders
How to tell Tourette disorder and OCD and other tic disorders apart when a board question makes them look alike.
Tourette is motor plus vocal tics for over 1 year; persistent tic is motor or vocal only; provisional tic is under 1 year; OCD is obsession-compulsion driven.
Side by side
Tourette disorder has multiple motor tics and at least one vocal tic, present for more than 1 year, with onset before age 18 and not due to substances or another condition.
OCD has intrusive obsessions and compulsions; persistent tic disorder has motor or vocal tics but not both for more than 1 year; provisional tic disorder lasts less than 1 year.
Tics are sudden, rapid, recurrent, nonrhythmic motor movements or vocalizations; Tourette requires both motor and vocal tic history over time.
OCD behaviors are performed to neutralize obsessions, while tic disorders are classified by motor/vocal type and duration.
Eye blinking, shoulder shrugging, throat clearing, sniffing, grunting, premonitory urge, suppressibility, and ADHD/OCD comorbidity support tic-spectrum disease.
Ego-dystonic contamination thoughts with ritual washing support OCD; only motor or only vocal tics for more than 1 year support persistent tic disorder.
The trap
Compulsions and tics can both feel urge-driven, so ask whether the behavior neutralizes an obsession or is a tic with motor/vocal pattern.
The repair move
For repetitive behaviors, classify tic type and duration before switching to OCD.
Try a free question
CoreA 9-year-old has eye blinking, shoulder jerks, throat clearing, and sniffing for 18 months, with urges that briefly improve after the tic. Which diagnosis is most likely?
Show answer and explanation
Answer: A. Tourette disorder. Multiple motor tics plus vocal tics for more than 1 year with childhood onset supports Tourette disorder.
Why the other choices are tempting
- B. OCD is driven by obsessions and compulsions rather than motor plus vocal tics.
- C. Persistent motor tic disorder has motor tics only, not both motor and vocal tics.
- D. Provisional tic disorder lasts less than 1 year.
- E. Stereotypic movement disorder has repetitive purposeless movements, often earlier and more rhythmic than tics.
Flashcards
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What tic pattern defines Tourette disorder?
Multiple motor tics plus at least one vocal tic for more than 1 year defines Tourette disorder.
What age of onset supports Tourette disorder?
Onset before age 18 supports Tourette disorder.
Quick answers
What is the fastest way to tell Tourette disorder from OCD and other tic disorders?
Tourette is motor plus vocal tics for over 1 year; persistent tic is motor or vocal only; provisional tic is under 1 year; OCD is obsession-compulsion driven.
What is the key clue for Tourette disorder?
Tourette disorder has multiple motor tics and at least one vocal tic, present for more than 1 year, with onset before age 18 and not due to substances or another condition.
What is the key clue for OCD and other tic disorders?
OCD has intrusive obsessions and compulsions; persistent tic disorder has motor or vocal tics but not both for more than 1 year; provisional tic disorder lasts less than 1 year.
What is the common trap with Tourette disorder vs OCD and other tic disorders?
Compulsions and tics can both feel urge-driven, so ask whether the behavior neutralizes an obsession or is a tic with motor/vocal pattern.