RESUMO
No disponible
Assuntos
Humanos , Síndrome MELAS/genética , DNA Mitocondrial/genética , Variação Genética/genéticaRESUMO
No disponible
Assuntos
Humanos , Masculino , Criança , Leucovorina/uso terapêutico , Síndrome de Kearns-Sayre/tratamento farmacológico , Resultado do Tratamento , Deleção de Genes , Síndrome de Kearns-Sayre/genéticaRESUMO
TITLE: La miopatia aislada por mutacion m.8344A>G no es infrecuente y puede derivar con el tiempo en una enfermedad multisistemica.
Assuntos
Síndrome MERRF , Doenças Musculares , DNA Mitocondrial , Humanos , Mitocôndrias/genética , MutaçãoRESUMO
No disponible
Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Doenças Musculares/diagnóstico , Doenças Musculares/genética , Síndrome MERRF/genética , Disfunção Cognitiva/genética , Síndrome MERRF/diagnóstico , DNA Mitocondrial/genética , Mutação/genéticaRESUMO
We have previously found that the late reflex electromyographic (EMG) responses to muscle stretch are simultaneously present in both the stretched muscle and its antagonist, suggesting that it may be involved in the control of limb stiffness rather than in a servo-mechanism that returns the limb to an initial or intended position. Nevertheless, in these earlier experiments the size of the late EMG activity was always greater in the stretched muscle than its antagonist, suggesting also a possible servo-role for these responses. To clarify this, we have now recorded the late EMG activity simultaneously from both the right extensor and flexor carpi radialis muscles in ten subjects under four experimental conditions. These conditions differed in which muscle was activated voluntarily prior to the stretch stimulus and in which muscle was stretched by the perturbing force. In all cases subjects were asked to maintain the limb in a fixed position and oppose any displacement that occurred. The amount of integrated EMG activity for both the M2 and M3 components of the late response was greater in the agonist muscle (i.e., the muscle actually stretched by the perturbing force) than the antagonist. The ratio of agonist to antagonist activity, however, was significantly larger for the M2 than for the M3 component. These results suggest that both the M2 and M3 components of the late EMG response have a dual functional role, being involved both in a servo-mechanism and in the control of limb stiffness. Each component, however, seems to have a distinctive role.(ABSTRACT TRUNCATED AT 250 WORDS)
Assuntos
Eletromiografia , Neurônios Motores/fisiologia , Contração Muscular , Músculos/fisiologia , Reflexo de Estiramento/fisiologia , Adulto , Potenciais Evocados , Antebraço , Humanos , Músculos/inervação , Estresse Mecânico , Fatores de Tempo , Articulação do PunhoRESUMO
A 51 year old woman with pneumonia developed Miller Fisher syndrome. Indirect immunofluorescence tests showed antibodies against Coxiella burnetti. Miller Fisher syndrome associated with Q fever has not been described previously.
