Presence of Bereitschaftspotential preceding psychogenic myoclonus: clinical application of jerk-locked back averaging.
J Neurol Neurosurg Psychiatry
; 58(6): 745-7, 1995 Jun.
Article
en En
| MEDLINE
| ID: mdl-7608681
ABSTRACT
The method of jerk-locked back averaging was applied to six patients with clinically diagnosed psychogenic myoclonus. Five patients had a slow negative EEG shift corresponding to Bereitschaftspotential at the central region starting 0.7 to 2.1 seconds before the onset of the myoclonic jerk. One patient had no potential preceding the myoclonic jerk, whereas a small negative potential preceded the voluntary movement mimicking the jerk. The demonstration of Bereitschaftspotential before an apparently involuntary myoclonic jerk helps the clinical diagnosis of psychogenic myoclonus, although the absence of Bereitschaftspotential does not necessarily indicate that the movement is involuntary. Jerk-locked back averaging is clinically useful as a specific laboratory examination in this condition.
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Trastornos Psicofisiológicos
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Variación Contingente Negativa
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Mioclonía
Límite:
Adult
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Aged
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Female
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Humans
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Male
Idioma:
En
Revista:
J Neurol Neurosurg Psychiatry
Año:
1995
Tipo del documento:
Article
País de afiliación:
Japón