Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck Pain
Introduction: Neuromuscular imbalance between right and left sides of Cervical Erector Spinae (CES) muscles can induce pain by applying the asymmetric loads on the spine incorrectly. This study evaluated the symmetry of the right and left cervical flexion-relaxation ratio (FRR) in patients with Non...
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| Format: | Article |
| Language: | English |
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Tehran University of Medical Sciences
2022-04-01
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| Series: | Journal of Modern Rehabilitation |
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| Online Access: | https://jmr.tums.ac.ir/index.php/jmr/article/view/420 |
| _version_ | 1811256769150713856 |
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| author | Hasan Shamsi Khosro Khademi Farshad Okhovatian |
| author_facet | Hasan Shamsi Khosro Khademi Farshad Okhovatian |
| author_sort | Hasan Shamsi |
| collection | DOAJ |
| description |
Introduction: Neuromuscular imbalance between right and left sides of Cervical Erector Spinae (CES) muscles can induce pain by applying the asymmetric loads on the spine incorrectly. This study evaluated the symmetry of the right and left cervical flexion-relaxation ratio (FRR) in patients with Non-Specific Chronic Neck Pain (NSCNP) and healthy subjects.We aimed to investigate the symmetry of FRR on the right and left sides of the CES muscles in individuals with and without NSCNP.
Materials and Methods: A total of 25 patients with NSCNP and 25 healthy subjects participated in this study. The surface electromyography activity of CES muscles during four phases of flexion and extension tasks were measured and recorded. Unilateral FRR in the right and left sides of CES muscles was calculated and compared in each group.
Results: Only in NSCNP patients, FRR in the right CES muscle was significantly higher than that in the left one (P<0.05). Also, FRR for bilateral CES muscles was significantly higher in healthy subjects than in NSCNP patients (P<0.001).
Conclusion: The study results indicated a greater FRR asymmetry in CES muscles in NSCNP patients than in healthy subjects. This asymmetry is probably due to the dominance of the limb. Moreover, asymmetric FRR as a kind of neuromuscular imbalance may cause pain due to imposing asymmetric loads on spine structures.
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| first_indexed | 2024-04-12T17:46:20Z |
| format | Article |
| id | doaj.art-7e997264266f478ba68b295c942ac9e7 |
| institution | Directory Open Access Journal |
| issn | 2538-385X 2538-3868 |
| language | English |
| last_indexed | 2024-04-12T17:46:20Z |
| publishDate | 2022-04-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Journal of Modern Rehabilitation |
| spelling | doaj.art-7e997264266f478ba68b295c942ac9e72022-12-22T03:22:39ZengTehran University of Medical SciencesJournal of Modern Rehabilitation2538-385X2538-38682022-04-0116210.18502/jmr.v16i2.9305Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck PainHasan Shamsi0Khosro Khademi1Farshad Okhovatian2Department of Physiotherapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.Department of Physiotherapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.Physiotherapy Research Center, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Introduction: Neuromuscular imbalance between right and left sides of Cervical Erector Spinae (CES) muscles can induce pain by applying the asymmetric loads on the spine incorrectly. This study evaluated the symmetry of the right and left cervical flexion-relaxation ratio (FRR) in patients with Non-Specific Chronic Neck Pain (NSCNP) and healthy subjects.We aimed to investigate the symmetry of FRR on the right and left sides of the CES muscles in individuals with and without NSCNP. Materials and Methods: A total of 25 patients with NSCNP and 25 healthy subjects participated in this study. The surface electromyography activity of CES muscles during four phases of flexion and extension tasks were measured and recorded. Unilateral FRR in the right and left sides of CES muscles was calculated and compared in each group. Results: Only in NSCNP patients, FRR in the right CES muscle was significantly higher than that in the left one (P<0.05). Also, FRR for bilateral CES muscles was significantly higher in healthy subjects than in NSCNP patients (P<0.001). Conclusion: The study results indicated a greater FRR asymmetry in CES muscles in NSCNP patients than in healthy subjects. This asymmetry is probably due to the dominance of the limb. Moreover, asymmetric FRR as a kind of neuromuscular imbalance may cause pain due to imposing asymmetric loads on spine structures. https://jmr.tums.ac.ir/index.php/jmr/article/view/420Flexion-relaxation phenomenonFlexion-Relaxation ratio asymmetryNon-specific chronic neck painCervical erector spinae |
| spellingShingle | Hasan Shamsi Khosro Khademi Farshad Okhovatian Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck Pain Journal of Modern Rehabilitation Flexion-relaxation phenomenon Flexion-Relaxation ratio asymmetry Non-specific chronic neck pain Cervical erector spinae |
| title | Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck Pain |
| title_full | Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck Pain |
| title_fullStr | Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck Pain |
| title_full_unstemmed | Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck Pain |
| title_short | Investigation of Flexion-Relaxation Ratio Symmetry in Subjects with and without Non-Specific Chronic Neck Pain |
| title_sort | investigation of flexion relaxation ratio symmetry in subjects with and without non specific chronic neck pain |
| topic | Flexion-relaxation phenomenon Flexion-Relaxation ratio asymmetry Non-specific chronic neck pain Cervical erector spinae |
| url | https://jmr.tums.ac.ir/index.php/jmr/article/view/420 |
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