Hemifacial spasm: an electrophysiological evidence of facial motorneurons hyperexcitability.
Artigo
em Inglês
| IMSEAR
| ID: sea-43757
ABSTRACT
Twenty patients with primary hemifacial spasm and ten patients with Parkinson's disease were studied by means of paired stimuli blink reflex. The second stimuli were delivered at a varying time interval between 50-900 ms. The R2 response's absolute refractory periods were compared between patients and twenty one age-matched normal controls as well as between hemifacial spasm and Parkinson's disease. In normal subjects, the mean absolute refractory period was found to be 271.42 +/- 64.36 ms, in hemifacial spasm 160.00 +/- 50.62 ms and in Parkinson's disease 157.14 +/- 53.45 ms. The absolute refractory periods obtained from patients were significantly shorter than in normal controls (p < 0.05). However the values between patients with hemifacial spasm and Parkinson's disease were not (p > 0.05). This result strongly supports bilateral facial motoneurons hyperexcitability as the underlying mechanism of hemifacial spasm.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Período Refratário Eletrofisiológico
/
Espasmo
/
Feminino
/
Humanos
/
Masculino
/
Estudos de Casos e Controles
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Adulto
/
Músculos Faciais
/
Pessoa de Meia-Idade
/
Neurônios Motores
Tipo de estudo:
Estudo observacional
Idioma:
Inglês
Ano de publicação:
1994
Tipo de documento:
Artigo
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