Effects of Crossed Brassiere Straps on Pain, Range of Motion, and Electromyographic Activity of Scapular Upward Rotators in Women With Scapular Downward Rotation Syndrome
Effects of Crossed Brassiere Straps on Pain, Range of Motion, and Electromyographic Activity of Scapular Upward Rotators in Women With Scapular Downward Rotation Syndrome
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DOI：
10.1016/j.pmrj.2015.05.016
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发表时间：
2015-12-01
期刊：
影响因子：
2.1
通讯作者：
Oh, Jae-seop
中科院分区：
文献类型：
--
作者：
Kang, Min-Hyeok;Choi, Ji-Young;Oh, Jae-seop
背景资料：肩胛骨下旋综合征表现为休息时或手臂运动时肩胛骨异常下旋，通常导致颈部和肩部疼痛。胸罩带被认为是肩胛骨向下旋转和上肌疼痛的可能促成因素，因为肩胛骨外侧向下旋转力增加。然而，还没有研究检查改良胸罩带对肩胛肌疼痛和功能的影响。目的：检查交叉胸罩带对肩胛下旋综合征女性患者上斜方肌的压痛阈值（PPT）、颈部旋转运动范围（ROM）和肩胛上旋肌的肌电图活动的影响。设计：交叉设计。设置：Laboratory.Participants:在医院和当地university.Methods招募了15名女性受试者肩胛骨向下旋转综合征：所有参与者进行颈部旋转和肱骨抬高2种不同的条件下：平行和交叉braziere strap.Main结局measurements：PPT的上腭肌使用模拟测痛仪，而颈部旋转ROM进行了量化与三维超声运动分析系统。采用表面肌电仪对肱骨上举过程中上睑肌、前锯肌和下睑肌的肌电活动进行评估。结果的措施进行了评估下平行和交叉胸罩带的条件下，结果之间的差异进行了分析，使用配对t-test.Results：PPT和颈部旋转ROM增加时，受试者穿着胸罩与交叉与平行带（P <0.001）。交叉吊带组前锯肌、下斜肌和上斜肌的肌电活动明显高于平行吊带组（P <0.05）。结论：这些结果为临床医生设计治疗方案以减轻女性肩胛下旋综合征患者的疼痛和改善其生物力学功能提供了有用的信息。
Background: Scapular downward rotation syndrome manifests as an abnormally downward-rotated scapula at rest or with arm motion and typically results in neck and shoulder pain. The brassiere strap has been suggested as a possible contributing factor to scapula downward rotation and pain in the upper trapezius because of increased downward rotational force on the lateral aspect of the scapula. No study, however, has examined the influences of a modified brassiere strap on pain in and the function of the scapular muscles.Objective: To examine the effects of crossed brassiere straps on the pressure pain threshold (PPT) of the upper trapezius, neck rotation range of motion (ROM), and electromyographic activity of the scapular upward rotators in females with scapular downward rotation syndrome.Design: Cross-over design.Setting: Laboratory.Participants: In total, 15 female subjects with scapular downward rotation syndrome were recruited at hospitals and a local university.Methods: All participants performed neck rotation and humeral elevation under 2 different conditions: parallel and crossed brassiere straps.Main outcome measurements: The PPT of the upper trapezius was measured using an analog algometer, whereas neck rotation ROM was quantified with a 3-dimensional ultrasonic motion analysis system. The electromyographic activities of the upper trapezius, serratus anterior, and lower trapezius during humeral elevation were assessed with a surface electromyography system. Outcome measures were assessed under parallel and crossed brassiere strap conditions, and differences in outcomes between the conditions were analyzed using a paired t-test.Results: The PPT and neck rotation ROM were increased when the subject was wearing the brassiere with crossed versus parallel straps (P < .001). Greater electromyographic activities of the serratus anterior, lower trapezius, and lesser upper trapezius muscles during humeral elevation were found under the crossed strap condition than the parallel strap condition (P < .05).Conclusions: These findings provide useful information for clinicians when designing management programs to decrease pain and improve biomechanical function for females with scapular downward rotation syndrome.