Psoas and iliacus muscles act in concert or selectively during natural movements in man

Andersson, Eva; Grundström, Heléne; Oddsson, Lars; Thorstensson, Alf

doi:10.1016/0021-9290(92)90427-3

Journal of Biomechanics

1992

DOI: 10.1016/0021-9290(92)90427-3

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Psoas and iliacus muscles act in concert or selectively during natural movements in man

Eva Andersson¹,

Heléne Grundström²,

Lars Oddsson³

et al.

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1995

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“…Attempts have been made using roentgenograms (11,15) which, however, give a limited visualization of the muscles. In our laboratory we have successfully used the clinically well established method of high-resolution ultrasound to guide the insertion of intramuscular wire electrodes into the iliacus (18) and simultaneously into the psoas and iliacus (19) as well as the different layers of the abdominal muscles (20).…”

mentioning

confidence: 99%

The role of the psoas and iliacus muscles for stability and movement of the lumbar spine, pelvis and hip

Andersson

Oddsson

Grundström

et al. 1995

Scandinavian Med Sci Sports

148

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The activation patterns of the psoas and iliacus muscles were investigated in 7 healthy adult subjects (4 men and 3 women) during a variety of motor tasks in standing, sitting and lying. Myoelectric activity was recorded simultaneously from the 2 muscles using thin wire electrodes inserted under guidance of high‐resolution ultrasound. In general, both muscles were coactivated, albeit to different relative levels, particularly when hip flexor torque was required. Selective activation of the iliacus could, however, be seen to stabilize the pelvis in contralateral hip extension during standing. Psoas was found to be selectively involved in sitting with a straight back and in contralateral loading situations requiring stabilization of the spine in the frontal plane. During training exercises from a supine position, such as sit‐ups, the contribution of the psoas and iliacus muscles could be varied by changing the range of motion as well as the position and support for the legs. Thus, the 2 anatomically different muscles of the iliopsoas complex were shown to have individual and taskspecific activation patterns depending on the particular demands for stability and movement at the lumbar spine, pelvis and hip.

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mentioning

confidence: 99%

The role of the psoas and iliacus muscles for stability and movement of the lumbar spine, pelvis and hip

Andersson

Oddsson

Grundström

et al. 1995

Scandinavian Med Sci Sports

148

View full text Add to dashboard Cite

show abstract

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Psoas and iliacus muscles act in concert or selectively during natural movements in man

Cited by 1 publication

References 0 publications

The role of the psoas and iliacus muscles for stability and movement of the lumbar spine, pelvis and hip

The role of the psoas and iliacus muscles for stability and movement of the lumbar spine, pelvis and hip

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