ArticleEuropean journal of applied physiology2023
Lumbar muscle adaptations to external perturbations are modulated by trunk posture.
Article in European journal of applied physiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Methods for assessing core muscle co-activation in the lumbar region: a narrative review.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Review
- Age-related alterations in trunk extensor force control during isometric and isokinetic contractions.Scientific reports · 2026Article
- Fatigue-induced alterations in the spatial distribution of lumbar erector spinae activity in older versus young adults.European journal of applied physiology · 2025Article
- Individuals with chronic low back pain show impaired adaptations of lumbar extensor muscle reflex amplitude during unexpected perturbations.European journal of applied physiology · 2025Article
- The trunk segmental motion complexity and balance performance in challenging seated perturbation among individuals with spinal cord injury.Journal of neuroengineering and rehabilitation · 2025Article
- Task-dependent neuromuscular adaptations in low back pain: a controlled experimental study.Frontiers in human neuroscience · 2024Article
- Novel Metrics for High-Density sEMG Analysis in the Time-Space Domain During Sustained Isometric Contractions.IEEE open journal of engineering in medicine and biology · 2024Article
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Authors and funding
4 authors.
Funding
Abstract
purposeTo investigate if the recruitment of different regions within the lumbar extensor muscles in response to unexpected perturbations depends on trunk posture.
methodsIn a semi-seated posture, healthy adult participants experienced unexpected posterior-anterior trunk perturbations in three different postures: neutral, trunk flexion and left trunk rotation. High-density surface electromyography was used to identify the regional distribution of activation within the lumbar erector spinae muscles. The effect of posture and side (left vs right) on muscle activity and centroid coordinates was investigated at baseline and in response to perturbations.
resultsHigher muscle activity was observed in trunk flexion compared to neutral and rotation postures at baseline (multiple p < 0.001) and in response to the perturbation (multiple p < 0.01). At baseline, the centroid of the electromyographic amplitude distribution was localized more medially in trunk flexion compared to trunk neutral posture (p = 0.003), while activation was localized more laterally in response to the perturbation (multiple p < 0.05). When the trunk was rotated, the electromyographic amplitude distribution was localized more cranially on the left than the right side, both at baseline (p = 0.001) and in response to the perturbation (p = 0.001). Finally, a more lateral location of the centroid on the left side in rotation compared to neutral posture was observed in response to the perturbation (multiple p < 0.001).
conclusionsRegional differences in the distribution of electromyographic amplitude indicate that different muscle regions were recruited in different trunk postures and in response to perturbations, possibly based on regional mechanical advantage of the erector spinae muscle fibers.
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