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- Landén Ludvigsson, Maria, et al.
(författare)
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Mechanical properties of the trapezius during scapular elevation in people with chronic whiplash associated disorders : A case-control ultrasound speckle tracking analysis
- 2016
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Ingår i: Manual Therapy. - : Elsevier BV. - 1356-689X .- 1532-2769. ; 21, s. 177-182
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Tidskriftsartikel (refereegranskat)abstract
- Background: Approximately 50% of people with Whiplash Associated Disorders (WAD) report longstanding symptoms. The upper trapezius is commonly painful yet its mechanical properties are not fully understood.Objectives: This study examined the deformation of different depths of the upper trapezius muscle during a scapular elevation task (shoulder shrugging) before and following loaded arm abduction. Design and Methods: A cross-sectional case-control study of 36 people (26 female and 10 male, mean age 38 (SD 11)) with chronic WAD and 36 controls, matched for age and gender. Real-time ultrasound recordings of upper trapezius were taken during both scapular elevation tasks. Post-process speckle tracking analysis was undertaken of three different sections of the upper trapezius muscle (superficial, middle, deep).Results: The WAD group had lower deformation of the superficial section of the upper trapezius compared to the control group in both concentric and eccentric phases of scapular elevation (p < 0.05) especially before the loaded arm abduction. After arm abduction, the deformation of the trapezius was reduced in both groups but only significantly in the WAD-group (p = 0.03). Within-group analysis revealed that the control group least engaged the deep section of upper trapezius during the task (p < 0.01).Conclusion: This study, measuring mechanical deformation of the upper trapezius during a scapular elevation task indicates that persons with WAD may display different patterns in engagement of the muscle sections than those in the control group. Further research is needed to replicate and understand the reasons for and implications of this possible change in motor strategy within upper trapezius.
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| 2. |
- Peolsson, A., et al.
(författare)
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Altered mechanical deformation of the trapezius and multifidus muscles registered with ultrasonography in women with chronic whiplash-associated disorders
- 2016
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Ingår i: Manual Therapy. - : Elsevier BV. - 1356-689X .- 1532-2769. ; 25, s. e58-
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Tidskriftsartikel (refereegranskat)abstract
- Background: The deformation and deformation rate of the dorsal neck muscle layers in individuals with chronic whiplash associated disorders (WAD) is rarely evaluated, and the mechanical behaviour during dynamic neck extension remains to be investigated.Purpose: To compare the deformation and deformation rate of dorsal neck muscles (trapezius, splenius capitis, semispinalis capitis and cervicis, and multifidus) in women with chronic WAD compared with healthy controls during a dynamic resisted neck extension.Methods: Nine women with chronic grade 2 and 3 WAD (mean age 38 years, standard deviation [SD] 11.3) and nine age- and gender-matched healthy controls (mean age 38 years, SD 11.6) participated in this cross-sectional, controlled study. Ultrasonography movies and post-process speckle tracking were used to investigate real-time mechanical dorsal neck muscle behaviour at the C4 segmental level during a low-loaded dynamic standardized neck extension. Deformation (longitudinal shortening and elongation) and deformation rate (speed of deformation) were calculated during the entire exercise sequence.Results: There were significant differences between the WAD and control groups in total deformation for the trapezius (p < 0.04) and multifidus (p < 0.03). The WAD group showed more shortening in the deformation pattern during the concentric contraction phase in the trapezius muscle, and during both the concentric and eccentric phase in the multifidus muscle compared to healthy controls. There were no other significant differences between groups either in deformation or deformation rate.Conclusion: There were altered mechanical deformations of the trapezius and multifidus muscles, with preliminary evidence for overuse in individuals with WAD compared to healthy controls. The findings must be interpreted with caution due to the small sample size.Implications: An ultrasound investigation made it possible to non-invasively capture multi-layered muscles in real time, adding new information of value for clinical practice of patients with WAD, which may impact future rehabilitation.
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| 3. |
- Peolsson, Anneli, et al.
(författare)
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Ultrasound imaging with speckle tracking of cervical muscle deformation and deformation rate : isometric contraction of patients after anterior cervical decompression and fusion for cervical disc disease and controls
- 2012
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Ingår i: Manual Therapy. - : Elsevier BV. - 1356-689X .- 1532-2769. ; 17:6, s. 519-525
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Tidskriftsartikel (refereegranskat)abstract
- There is currently a lack of information regarding neck muscle activity during specific exercises. The purpose of the present study was to investigate deformation and deformation rate in different layers of dorsal and ventral neck muscles during isometric neck muscle contraction in individuals after anterior cervical decompression and fusion and in healthy controls. This study included 10 individuals (mean age 60 years; SD 7.1) with a verified, long-standing neck disorder and 10 healthy, age- and sex-matched controls. Ultrasonography and post-process speckle tracking analysis was used to investigate the degree and the rate of neck muscles motions at the C4 segmental level during sub-maximal, isometric resistance of the head in a seated position. None of the analyses performed showed significant differences between groups (p > 0.05). In the dorsal muscles, both groups exhibited a higher deformation rate in the multifidus than in the trapezius, splenius, and semispinalis capitis (p ≤ 0.01). In the neck disorder group, the multifidus also showed a higher deformation rate compared to the semispinalis cervicis (p = 0.02). In the ventral muscles of patients with neck disorders, the longus colli had a higher deformation rate than the sternocleidomastoid (p = 0.02). Among the healthy controls, the multifidus showed a higher degree of deformation (p = 0.02) than the trapezius. In conclusion, our results showed no significant differences between the two groups in mechanical neck muscle activation. Larger studies with different exercises, preferably with a standardized measure of resistance, are needed to investigate whether patients and controls show differences in deformation and deformation rates in neck muscles.
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| 4. |
- Peterson, Gunnel, et al.
(författare)
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Altered ventral neck muscle deformation for individuals with whiplash associated disorder compared to healthy controls : A case-control ultrasound study
- 2015
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Ingår i: Manual Therapy. - : Elsevier. - 1356-689X .- 1532-2769. ; 20:2, s. 319-327
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Tidskriftsartikel (refereegranskat)abstract
- Previous studies have shown altered neck muscle function in individuals with chronic whiplash associated disorder (WAD). However, we lack real-time investigations with non-invasive methods that can distinguish between the different ventral neck muscle layers. This study investigated deformations and deformation rates in the sternocleidomastoid (SCM), longus capitis (Lcap), and longus colli (Lco) muscles with real-time ultrasonography. Twenty-six individuals with WAD were compared with 26 controls, matched for age and sex. Ultrasound imaging of the SCM, Lcap, and Lco were recorded during 10 repetitive arm elevations. The first and tenth arm elevations were post-process analyzed with speckle tracking. There were few significant differences in the deformations or deformation rates in the SCM, Lcap, and Lco between the WAD and control group. In controls, deformations and deformation rates showed linear positive relationships between SCM/Lcap, SCM/Lco, and Lcap/Lco which increased from the first arm elevation (R-2 = 0.14-0.70); to the tenth arm elevation (R-2 = 0.51-0.71). The WAD group showed similar or weaker linear relationship (R-2 < 0.19) during the tenth compared to the first (R-2 < 0.44) arm elevation except for deformations in Lcap/Lco (R-2 = 0.13-0.57). This result indicated that deformations and deformation rates in one muscle were correlated by similar deformations and deformation rates in other neck muscles in the control group, but this interplay between muscles was not found in the WAD group. (C) 2014 Elsevier Ltd. All rights reserved.
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