What question did this study set out to answer?

To assess the diagnostic accuracy of individual and combined electrophysiological tests in differentiating psychogenic tremor from various forms of organic tremor.

September 28, 2011Movement DisordersOpen Access

Moving toward “laboratory‐supported” criteria for psychogenic tremor

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Authors

PSPetra SchwingenschuhInnsbruck Medical University PKPetra KatschnigMedical University of Graz SSStephan SeilerMedical University of Graz

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Implication

Diagnostic cohort study demonstrates that combined electrophysiological tests distinguish psychogenic from organic tremors, highlighting the need for a multi-test battery.

Key Points

To assess the diagnostic accuracy of individual and combined electrophysiological tests in differentiating psychogenic tremor from various forms of organic tremor.
Evaluated baseline tremor characteristics and electrophysiological measures in a cohort of 13 patients with psychogenic tremor and 25 patients with organic tremors (including Parkinson disease, essential, dystonic, and neuropathic tremors).
Assessed tapping entrainment or frequency shifts, tremor pause during contralateral ballistic movements, amplitude changes with loading, coherence, and tonic coactivation at onset to calculate sensitivity and specificity.
Individual electrophysiological tests demonstrated significant differences between groups but failed to offer adequate standalone accuracy, yielding sensitivities ranging from 33% to 77% and specificities ranging from 84% to 100%.
Combining multiple electrophysiological tests into a single diagnostic battery successfully distinguished psychogenic tremor from organic tremors with excellent overall sensitivity and specificity.

Cite This Study

Schwingenschuh et al. (2011) studied this question.

synapsesocial.com/papers/6a72b04ef44fa9f079e01401 https://doi.org/10.1002/mds.23922

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Implication

Diagnostic cohort study demonstrates that combined electrophysiological tests distinguish psychogenic from organic tremors, highlighting the need for a multi-test battery.

Moving toward “laboratory‐supported” criteria for psychogenic tremor

Discussion

Member takes

Implication

Key Points

Cite This Study

Moving toward “laboratory‐supported” criteria for psychogenic tremor

Discussion

Member takes

Implication

Key Points

Cite This Study

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