Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands
Background: The prevalence of dystonia varies worldwide. A prior report suggested a high prevalence of focal dystonia in the Faroese population, possibly reflecting a founder effect. During standardized neurological examination as part of an ongoing neuroepidemiologic study in the Faroe Islands, we...
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Tremor and Other Hyperkinetic Movements
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ftdatacite:10.7916/tohm.v0.686 2023-05-15T16:10:21+02:00 Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands Y. Kim, Christine Petersen, Maria Skaalum Eliasen, Eina H. Defazio, Giovanni Greene, Paul Jinnah, Hyder A. Tijssen, Marina A.J. Louis, Elan D. 2019 https://dx.doi.org/10.7916/tohm.v0.686 https://tremorjournal.org/index.php/tremor/article/view/686 en eng Tremor and Other Hyperkinetic Movements Text Article article-journal ScholarlyArticle 2019 ftdatacite https://doi.org/10.7916/tohm.v0.686 2021-11-05T12:55:41Z Background: The prevalence of dystonia varies worldwide. A prior report suggested a high prevalence of focal dystonia in the Faroese population, possibly reflecting a founder effect. During standardized neurological examination as part of an ongoing neuroepidemiologic study in the Faroe Islands, we noted an unusual phenomenon of thumb flexion during repetitive hand movements in a subset of subjects and sought to define its phenomenology. Methods: We requested commentary from a panel of dystonia experts regarding the phenomenology of the movements. These experts reviewed the videotaped neurological examination. Results: Among the experts, dystonia was the leading diagnosis. Alternate causes were considered, but deemed less likely. Discussion: Diagnosis of dystonia requires careful clinical assessment and consideration of associated features. We report a novel form of dystonia, not previously described to our knowledge, in this isolated population. Further studies of dystonia prevalence in the Faroe Islands are merited to characterize its burden in this population and its specific clinical characteristics. Keywords: Dystonia, focal dystonia, Faroe Islands, thumb flexion, phenomenology Citation: Kim CY, Petersen MS, Eliasen EH, Defazio G, Greene P, Jinnah HA, et al. Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands. Tremor Other Hyperkinet Mov. 2019; 9. doi: 10.7916/tohm.v0.686 : Tremor and Other Hyperkinetic Movements, Tremor and Other Hyperkinetic Movements Text Faroe Islands DataCite Metadata Store (German National Library of Science and Technology) Eliasen ENVELOPE(22.411,22.411,70.331,70.331) Faroe Islands Greene ENVELOPE(168.233,168.233,-72.100,-72.100) Jinnah ENVELOPE(25.750,25.750,-70.400,-70.400) Petersen ENVELOPE(-101.250,-101.250,-71.917,-71.917) Thumb ENVELOPE(-64.259,-64.259,-65.247,-65.247) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Background: The prevalence of dystonia varies worldwide. A prior report suggested a high prevalence of focal dystonia in the Faroese population, possibly reflecting a founder effect. During standardized neurological examination as part of an ongoing neuroepidemiologic study in the Faroe Islands, we noted an unusual phenomenon of thumb flexion during repetitive hand movements in a subset of subjects and sought to define its phenomenology. Methods: We requested commentary from a panel of dystonia experts regarding the phenomenology of the movements. These experts reviewed the videotaped neurological examination. Results: Among the experts, dystonia was the leading diagnosis. Alternate causes were considered, but deemed less likely. Discussion: Diagnosis of dystonia requires careful clinical assessment and consideration of associated features. We report a novel form of dystonia, not previously described to our knowledge, in this isolated population. Further studies of dystonia prevalence in the Faroe Islands are merited to characterize its burden in this population and its specific clinical characteristics. Keywords: Dystonia, focal dystonia, Faroe Islands, thumb flexion, phenomenology Citation: Kim CY, Petersen MS, Eliasen EH, Defazio G, Greene P, Jinnah HA, et al. Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands. Tremor Other Hyperkinet Mov. 2019; 9. doi: 10.7916/tohm.v0.686 : Tremor and Other Hyperkinetic Movements, Tremor and Other Hyperkinetic Movements |
format |
Text |
author |
Y. Kim, Christine Petersen, Maria Skaalum Eliasen, Eina H. Defazio, Giovanni Greene, Paul Jinnah, Hyder A. Tijssen, Marina A.J. Louis, Elan D. |
spellingShingle |
Y. Kim, Christine Petersen, Maria Skaalum Eliasen, Eina H. Defazio, Giovanni Greene, Paul Jinnah, Hyder A. Tijssen, Marina A.J. Louis, Elan D. Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands |
author_facet |
Y. Kim, Christine Petersen, Maria Skaalum Eliasen, Eina H. Defazio, Giovanni Greene, Paul Jinnah, Hyder A. Tijssen, Marina A.J. Louis, Elan D. |
author_sort |
Y. Kim, Christine |
title |
Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands |
title_short |
Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands |
title_full |
Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands |
title_fullStr |
Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands |
title_full_unstemmed |
Involuntary Thumb Flexion on Neurological Examination: An Unusual Form of Upper Limb Dystonia in the Faroe Islands |
title_sort |
involuntary thumb flexion on neurological examination: an unusual form of upper limb dystonia in the faroe islands |
publisher |
Tremor and Other Hyperkinetic Movements |
publishDate |
2019 |
url |
https://dx.doi.org/10.7916/tohm.v0.686 https://tremorjournal.org/index.php/tremor/article/view/686 |
long_lat |
ENVELOPE(22.411,22.411,70.331,70.331) ENVELOPE(168.233,168.233,-72.100,-72.100) ENVELOPE(25.750,25.750,-70.400,-70.400) ENVELOPE(-101.250,-101.250,-71.917,-71.917) ENVELOPE(-64.259,-64.259,-65.247,-65.247) |
geographic |
Eliasen Faroe Islands Greene Jinnah Petersen Thumb |
geographic_facet |
Eliasen Faroe Islands Greene Jinnah Petersen Thumb |
genre |
Faroe Islands |
genre_facet |
Faroe Islands |
op_doi |
https://doi.org/10.7916/tohm.v0.686 |
_version_ |
1765995564724387840 |