The influence of increasing sacroiliac joint force closure on the hip and lumbar spine extensor muscle firing pattern.
Man Ther
; 14(5): 484-9, 2009 Oct.
Article
en En
| MEDLINE
| ID: mdl-19119054
ABSTRACT
The prone hip extension (PHE) test is commonly used in the evaluation of lumbo-pelvic dysfunction. It has been suggested that altered motor control identified by the PHE test can be improved with the application of compression force across the pelvis, to increase force closure on the sacroiliac joint (SIJ). This repeated measure study design investigated the effect of three levels of pelvis compression (0N, 50N, 100N) on the muscle firing pattern during the PHE test in 20 asymptomatic male subjects tested on two occasions 4-weeks apart. The right gluteus maximus, right semitendinosus and bilateral lumbar erector spinae were analyzed using surface electromyography (EMG). Subjects were instructed to perform right hip extension in prone position while maintaining knee-extension in each measurement condition. Compared with the onset of the semitendinosus muscle, gluteus maximus became active 263.3+/-99.5 ms later with no pelvic compression, 183.5+/-77.9 ms later with 50N compression, 91.5+/-49.7 ms later with 100N compression. While significant differences (alpha=0.05) were found in EMG onset for gluteus maximus under different levels of pelvis compression, this was not the case for the erector spinae, which had an inconsistent pattern of temporal onset and was not influenced by the level of pelvis compression force.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Articulación Sacroiliaca
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Posición Prona
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Músculo Esquelético
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Vértebras Lumbares
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Contracción Muscular
Límite:
Adult
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Humans
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Male
Idioma:
En
Revista:
Man Ther
Asunto de la revista:
MEDICINA FISICA
Año:
2009
Tipo del documento:
Article
País de afiliación:
Japón