Neuropsychological profile of psychogenic jerky movement disorders: Importance of evaluating non-credible cognitive performance and psychopathology

Carolien E. J. Heintz, Mirjam J. van Tricht, Sandra M. A. van der Salm, A. F. van Rootselaar, Danielle Cath, Ben Schmand, Marina A. J. Tijssen*

*Bijbehorende auteur voor dit werk

    OnderzoeksoutputAcademicpeer review

    34 Citaten (Scopus)

    Samenvatting

    Background Psychogenic movement disorders are disorders of movements that cannot be explained by a known neurological disorder and are assumed to be associated with psychiatric symptoms such as depression and anxiety.

    Objective To examine the neuropsychological profile of patients with psychogenic movement disorders.

    Methods We examined cognitive functioning using neuropsychological tests in 26 patients with clinically established psychogenic jerky movement disorders (PM D). We included 16 patients with Gilles de la Touren syndrome (GTS) who served as a patient control group, in addition to 22 healthy control subjects. Non-credible test performance was detected using a Symptom Validity Test (SVT). Psychopathology was also assessed.

    Results Apart from a worse performance on a verbal memory task, no evidence of neuropsychological impairments was found in our PM D sample. Interestingly however, patients with PMD reported more cognitive complaints in daily life and performed worse on the SVT than the two other groups. Patients with GTS did not report, or show, cognitive impairments. In patients with PMD, we found associations between verbal learning, SVT performance and severity of depression and anxiety complaints.

    Conclusions We conclude that some patients with PMD show non-credible cognitive symptoms. In contrast, no evident cognitive impairments were present in patients with PM D or GTS. Our study underlines the importance of assessment of non-credible response in patients with PM D. Additionally, non-credible response might aid in the differentiation of PM D from other movement disorders.

    Originele taal-2English
    Pagina's (van-tot)862-867
    Aantal pagina's6
    TijdschriftJournal of Neurology, Neurosurgery and Psychiatry
    Volume84
    Nummer van het tijdschrift8
    DOI's
    StatusPublished - 2013

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