Event related desynchronisation predicts functional propriospinal myoclonus.
Parkinsonism Relat Disord
; 31: 116-118, 2016 10.
Article
en En
| MEDLINE
| ID: mdl-27477621
ABSTRACT
OBJECTIVE:
Recent diagnostic criteria for functional movement disorders have proposed a "laboratory supported" level of diagnostic certainty where the clinical diagnosis is supported by a positive test. For functional myoclonus the Bereitschaftspotential (BP) is generally accepted as a positive laboratory test. We hypothesised that a different EEG measure, event-related desynchronisation (ERD), might be more effective.METHODS:
We analysed 20 patients with functional propriospinal myoclonus (fPSM) and 9 controls with organic myoclonus and performed back-averaging for BPs plus time-frequency decomposition to assess ERD and calculated sensitivity and specificity for both techniques.RESULTS:
The BP was present in only 25% of patients with fPSM while the majority showed a significant ERD (mean 38 Hz; sensitivity 65%). ERD was significant at the group level (p < 0.001), but not the BP (p > 0.05). Both BP and ERD were absent in our control group.CONCLUSION:
ERD in high-beta may be a useful new test for positive diagnosis of functional myoclonus.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Variación Contingente Negativa
/
Potenciales Evocados
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Mioclonía
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Límite:
Adult
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Aged
/
Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Parkinsonism Relat Disord
Asunto de la revista:
NEUROLOGIA
Año:
2016
Tipo del documento:
Article
País de afiliación:
Reino Unido