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Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus

Propriospinal myoclonus (PSM) is a rare disorder with repetitive flexor, arrhythmic jerks of the trunk, hips and knees. Its generation is presumed to relay in the spinal cord. We report a case series of 35 consecutive patients with jerks of the trunk referred as possible PSM to a tertiary referral c...

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Autores principales: van der Salm, Sandra M. A., Koelman, Johannes H. T. M., Henneke, Samantha, van Rootselaar, Anne-Fleur, Tijssen, Marina A. J.
Formato: Texto
Lenguaje:English
Publicado: Springer-Verlag 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2910307/
https://www.ncbi.nlm.nih.gov/pubmed/20352254
http://dx.doi.org/10.1007/s00415-010-5531-6
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author van der Salm, Sandra M. A.
Koelman, Johannes H. T. M.
Henneke, Samantha
van Rootselaar, Anne-Fleur
Tijssen, Marina A. J.
author_facet van der Salm, Sandra M. A.
Koelman, Johannes H. T. M.
Henneke, Samantha
van Rootselaar, Anne-Fleur
Tijssen, Marina A. J.
author_sort van der Salm, Sandra M. A.
collection PubMed
description Propriospinal myoclonus (PSM) is a rare disorder with repetitive flexor, arrhythmic jerks of the trunk, hips and knees. Its generation is presumed to relay in the spinal cord. We report a case series of 35 consecutive patients with jerks of the trunk referred as possible PSM to a tertiary referral center for movement disorders. We review classical PSM features as well as psychogenic and tic characteristics. In our case series, secondary PSM was diagnosed in one patient only. 34 patients showed features suggestive of a psychogenic origin of axial jerks. Diagnosis of psychogenic axial jerks was based on clinical clues without additional investigations (n = 8), inconsistent findings at polymyography (n = 15), regular eye blinking preceding jerks (n = 2), or the presence of a Bereitschaftspotential (BP) (n = 9). In addition, several tic characteristics were noted. Almost all patients referred with possible PSM in our tertiary referral clinic had characteristics suggesting a psychogenic origin even in the presence of a classic polymyography pattern or in the absence of a BP. Clinical overlap with adult-onset tics seems to exist. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00415-010-5531-6) contains supplementary material, which is available to authorized users.
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spelling pubmed-29103072010-08-09 Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus van der Salm, Sandra M. A. Koelman, Johannes H. T. M. Henneke, Samantha van Rootselaar, Anne-Fleur Tijssen, Marina A. J. J Neurol Original Communication Propriospinal myoclonus (PSM) is a rare disorder with repetitive flexor, arrhythmic jerks of the trunk, hips and knees. Its generation is presumed to relay in the spinal cord. We report a case series of 35 consecutive patients with jerks of the trunk referred as possible PSM to a tertiary referral center for movement disorders. We review classical PSM features as well as psychogenic and tic characteristics. In our case series, secondary PSM was diagnosed in one patient only. 34 patients showed features suggestive of a psychogenic origin of axial jerks. Diagnosis of psychogenic axial jerks was based on clinical clues without additional investigations (n = 8), inconsistent findings at polymyography (n = 15), regular eye blinking preceding jerks (n = 2), or the presence of a Bereitschaftspotential (BP) (n = 9). In addition, several tic characteristics were noted. Almost all patients referred with possible PSM in our tertiary referral clinic had characteristics suggesting a psychogenic origin even in the presence of a classic polymyography pattern or in the absence of a BP. Clinical overlap with adult-onset tics seems to exist. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00415-010-5531-6) contains supplementary material, which is available to authorized users. Springer-Verlag 2010-03-30 2010 /pmc/articles/PMC2910307/ /pubmed/20352254 http://dx.doi.org/10.1007/s00415-010-5531-6 Text en © The Author(s) 2010 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
spellingShingle Original Communication
van der Salm, Sandra M. A.
Koelman, Johannes H. T. M.
Henneke, Samantha
van Rootselaar, Anne-Fleur
Tijssen, Marina A. J.
Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus
title Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus
title_full Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus
title_fullStr Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus
title_full_unstemmed Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus
title_short Axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus
title_sort axial jerks: a clinical spectrum ranging from propriospinal to psychogenic myoclonus
topic Original Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2910307/
https://www.ncbi.nlm.nih.gov/pubmed/20352254
http://dx.doi.org/10.1007/s00415-010-5531-6
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