Evidence map›Paper›PMID 38468554›Full record

ArticleMovement disorders clinical practice2024

Functional Tic-Like Behaviors: A Common Comorbidity in Patients with Tourette Syndrome.

Kirsten R Müller-Vahl, Anna Pisarenko, Carolin Fremer, Martina Haas, Ewgeni Jakubovski, Natalia Szejko

Open access · bronzeAbstract read
In one paragraph

Article in Movement disorders clinical practice, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 2 pooled it
6.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 2 syntheses or guidelines pooled it, 22 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Tourette syndrome.Nature reviews. Disease primers · 2026
    Review
  4. Article
  5. Article
  6. Review
  7. Update on the Pathophysiology and Management of Tics.Current neurology and neuroscience reports · 2026
    Review
  8. Article
  9. Review
  10. Tic-Talk: Voices on Tourette's Labelling.Movement disorders clinical practice · 2025
    Article
  11. Article
  12. Review
  13. Article
  14. Review
  15. Article
  16. Review
  17. Article
  18. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 3 countries.

Kirsten R Müller-VahlClinic of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany.ORCID 0000-0002-7181-7419
Anna PisarenkoClinic of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany.
Carolin FremerClinic of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany.ORCID 0000-0002-9585-7415
Martina HaasClinic of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany.ORCID 0000-0003-3898-5784
Ewgeni JakubovskiClinic of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany.ORCID 0000-0001-8546-5330
Natalia SzejkoClinic of Psychiatry, Social Psychiatry and Psychotherapy, Hannover Medical School, Hannover, Germany.ORCID 0000-0001-6160-9221
Medizinische Hochschule Hannover · DEUniversity of Calgary · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundComorbid functional tic-like behaviors (FTB) have been described only rarely in patients with Tourette syndrome (TS).

objectivesWe present the first large sample of patients suffering from TS and FTB to raise awareness of this clinical presentation and to guide how to differentiate one from the other.

methodsWe analyzed clinical data of 71 patients (n = 27 [38.0%] female, mean age: 21.5, range: 11-55) with TS + FTB.

resultsIn the majority of patients, FTB started abruptly on average 15 years after tic onset with "treatment-resistant" complex movements and ("coprophenomena-like") vocalizations preceded by timely related psychological stressors. Psychological evaluation revealed evidence for internal conflicts (79%), emotional dysregulation (56%), and maintaining factors (70%). About one third of patients had a positive history for further medically unexplained symptoms. Compared to a large TS sample (n = 1032), patients with TS + FTB were more likely to be female, and presented significantly more common with "coprophenomena-like" symptoms, atypical influential factors, atypical descriptions of premonitory sensations, and higher rates of comorbid obsessive-compulsive disorder and "self-injurious" behavior.

conclusionsBased on our data it can be assumed that FTB is a common comorbidity in TS, similar to functional overlay in other movement disorders and epilepsy. Before classifying a patient as suffering from treatment-resistant TS, FTB should be ruled out.

Indexed as

Obsessive-Compulsive DisorderTicsTourette SyndromeAdultComorbidityFemaleHumansMaleSeverity of Illness IndexYoung Adultcomorbiditiescoprophenomenafunctional tic-like behaviorsticstourette syndrome

Identifiers

PMID38468554
PMCPMC10928340
OpenAlexW4388845931

What Socratic holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.