Compensatory behavior of the postural control system to flexion–relaxation phenomena

Hashemirad, Fahime; Talebian, Saeed; Olyaei, Gholamreza; Hatef, Boshra

doi:10.1016/j.jbmt.2010.04.008

Cited by 11 publications

(7 citation statements)

References 15 publications

(16 reference statements)

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“…One aim of this study was to identify the physical characteristics of participants without LBP that differ from those determined in previous studies of the FRR and lumbo-pelvic rhythm. Results of FRR in participants with NF followed previous study, the offset of muscle activities were shown 64-90% ROM max of lumbar spinal flexion in ES muscles 18,19) , and 48-56% ROM max of hip flexion in Biceps femoris 20) . The results of participants with PF, the offsets of L4 ES muscle and BF muscle during forward bending task had significantly delay.…”

Section: Discussionsupporting

confidence: 73%

“…The task was divided into four flexion phases of 0−25%, 26−50%, 51−75%, and 76−100% 17) by their forward bending angle (Hip flexion angle + lumbar spinal flexion angle), then an angular displacement of the hip or lumbar spine in a phase were divided forward bending angle in the same phase and counted every phases. These angular displacement were divided each joint ROM as the ratio of ROM, and these ratios were compared each phases between the two groups 18) .…”

Section: Participants and Methodsmentioning

confidence: 99%

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Comparison of effects of joint flexibility on the lumbo-pelvic rhythm in healthy university students while bending the trunk forward

Takahashi

Yamaji

2020

J Phys Ther Sci

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Purpose] To clarify the influence of flexibilities of the hip and lumbar spine joints on bending the trunk forward. [Participants and Methods] We assessed the joint flexibility of 47 healthy university students using the Beighton hypermobility score and assigned them to the group of normal or poor flexibility. We performed electromyography to acquire kinematic data and analyzed the three-dimensional motion while the students bent their trunks forward. Further, we compared the groups based on angular displacements of the hip joint and lumbar spine in each phase of the movement. Offset of the erector spinae and hip extensor muscle activity was calculated as a percentage (%) of the maximum range of motion.[Results] The lumbo-pelvic rhythm differed between participants with and without poor flexibility of the hip joint in the second half of the forward bending task. Participants with poor flexibility of the hip joint showed activation of the erector spinae and biceps femoris for a longer period compared to those with normal flexibility. Notably, flexion-relaxation responses were not found in the biceps femoris of 30% of the participants.[Conclusion] Poor hip joint flexibility may cause low back pain. Measuring the lumbopelvic rhythm might help identify individuals at a high risk of low back pain while they are still healthy.

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Section: Discussionsupporting

confidence: 73%

Section: Participants and Methodsmentioning

confidence: 99%

Comparison of effects of joint flexibility on the lumbo-pelvic rhythm in healthy university students while bending the trunk forward

Takahashi

Yamaji

2020

J Phys Ther Sci

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“…Alterations in lumbo-pelvic coordination denote changes in neuromuscular control of trunk motion as well as changes in the load sharing between passive and active components of the lower back (Davis and Jorgensen, 2005; Davis et al, 1965; Farfan, 1975; Hashemirad et al, 2010). Both neuromuscular control and load sharing have been recognized to play a role in LBP development (Abouhossein et al, 2011; Dubois et al, 2011; Hashemirad et al, 2009; Leinonen, 2003; Panjabi, 2003; van Dieën and Nussbaum, 2000).…”

Section: Introductionmentioning

confidence: 99%

Timing and magnitude of lumbar spine contribution to trunk forward bending and backward return in patients with acute low back pain

Shojaei

Vazirian

Salt

et al. 2017

Journal of Biomechanics

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Alterations in the lumbo-pelvic coordination denote changes in neuromuscular control of trunk motion as well as load sharing between passive and active tissues in the lower back. Differences in timing and magnitude aspects of lumbo-pelvic coordination between patients with chronic low back pain (LBP) and asymptomatic individuals have been reported; yet, the literature on lumbo-pelvic coordination in patients with acute LBP is scant. A case-control study was conducted to explore the differences in timing and magnitude aspects of lumbo-pelvic coordination between females with (n=19) and without (n=19) acute LBP. Participants in each group completed one experimental session wherein they performed trunk forward bending and backward return at preferred and fast paces. The amount of lumbar contribution to trunk motion (as the magnitude aspect) as well as the mean absolute relative phase (MARP) and deviation phase (DP) between thoracic and pelvic rotations (as the timing aspect) of lumbo-pelvic coordination were calculated. The lumbar contribution to trunk motion in the 2nd and the 3rd quarters of both forward bending and backward return phases was significantly smaller in the patient than the control group. The MARP and the DP were smaller in the patient vs. the control group during entire motion. The reduced lumbar contribution to trunk motion as well as the more in-phase and less variable lumbo-pelvic coordination in patients with acute LBP compared to the asymptomatic controls is likely the result of a neuromuscular adaptation to reduce painful deformation and to protect injured lower back tissues.

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“…This may have a logical cross-over to the issues discussed in the paper in this section, by Hashemirad et al (2010), on the flexor-relaxation phenomenon. They describe how a lumbar spine which has undergone creep due to prolonged flexion (for just 7 min or more) will create a statistically significant delayed flexor-relaxation phenomenon.…”

Section: Recent Timesmentioning

confidence: 72%

Chains, trains and contractile fields

Wallden¹

2010

Journal of Bodywork and Movement Therapies

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Compensatory behavior of the postural control system to flexion–relaxation phenomena

Cited by 11 publications

References 15 publications

Comparison of effects of joint flexibility on the lumbo-pelvic rhythm in healthy university students while bending the trunk forward

Comparison of effects of joint flexibility on the lumbo-pelvic rhythm in healthy university students while bending the trunk forward

Timing and magnitude of lumbar spine contribution to trunk forward bending and backward return in patients with acute low back pain

Chains, trains and contractile fields

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