In Vivo Assessment of Exercise-Induced Glenohumeral Cartilage Strain.
In Vivo Assessment of Exercise-Induced Glenohumeral Cartilage Strain.
复制标题
DOI：
10.1177/2325967118784518
复制
发表时间：
2018-07
影响因子：
2.6
通讯作者：
DeFrate LE
中科院分区：
文献类型：
--
作者：
Zhang H;Heckelman LN;Spritzer CE;Owusu-Akyaw KA;Martin JT;Taylor DC;Moorman CT 3rd;Garrigues GE;DeFrate LE
人体肩关节是人体内活动性最强的移动的关节。虽然在最低负荷条件下的体内肩部运动学已经研究，但尚不清楚盂肱软骨如何响应高需求负荷运动。一种高要求的上肢运动，俯卧撑，会引起盂肱关节软骨的压缩应变，这可以用经验证的基于磁共振成像（MRI）的技术来测量。描述性实验室研究。高分辨率MRI用于测量8名无上肢损伤或疾病史的研究参与者在运动前后的体内盂肱软骨厚度。手动MRI分割和三维建模技术用于生成运动前后肱骨头和关节盂软骨的厚度图。应变计算为运动前和运动后软骨厚度之间的差异，标准化为运动前软骨厚度。在肱骨头和关节盂软骨中分别检测到17% ± 6%和15% ± 7%（平均值± 95% CI）的显著压缩软骨应变。关节盂软骨前部区域的平均应变（19% ± 6%）显著高于关节盂软骨后部区域（12% ± 8%）。运动后肱骨头软骨应变无明显地区差异。俯卧撑会在盂肱关节的关节软骨上引起压缩应变，特别是在前关节盂处。这种基于MRI的方法可以应用于进一步了解高需求负荷条件下肩关节的软骨变化。这些结果提高了对健康盂肱软骨力学的理解，以应对负荷上肢运动。在未来，这些方法可以应用于确定哪些活动导致高盂肱软骨应变和偏离正常的肩部功能。
The human shoulder joint is the most mobile joint in the body. While in vivo shoulder kinematics under minimally loaded conditions have been studied, it is unclear how glenohumeral cartilage responds to high-demand loaded exercise. A high-demand upper extremity exercise, push-ups, will induce compressive strain in the glenohumeral articular cartilage, which can be measured with validated magnetic resonance imaging (MRI)–based techniques. Descriptive laboratory study. High-resolution MRI was used to measure in vivo glenohumeral cartilage thickness before and after exercise among 8 study participants with no history of upper extremity injury or disease. Manual MRI segmentation and 3-dimensional modeling techniques were used to generate pre- and postexercise thickness maps of the humeral head and glenoid cartilage. Strain was calculated as the difference between pre- and postexercise cartilage thickness, normalized to the pre-exercise cartilage thickness. Significant compressive cartilage strains of 17% ± 6% and 15% ± 7% (mean ± 95% CI) were detected in the humeral head and glenoid cartilage, respectively. The anterior region of the glenoid cartilage experienced a significantly higher mean strain (19% ± 6%) than the posterior region of the glenoid cartilage (12% ± 8%). No significant regional differences in postexercise humeral head cartilage strain were observed. Push-ups induce compressive strain on the glenohumeral joint articular cartilage, particularly at the anterior glenoid. This MRI-based methodology can be applied to further the understanding of chondral changes in the shoulder under high-demand loading conditions. These results improve the understanding of healthy glenohumeral cartilage mechanics in response to loaded upper extremity exercise. In the future, these methods can be applied to identify which activities induce high glenohumeral cartilage strains and deviations from normal shoulder function.
登录
查看更多内容
影响因子：
7
作者：
Bittersohl, B.;Miese, F. R.;Zilkens, C.
通讯作者：
Zilkens, C.
影响因子：
2.4
作者：
Owusu-Akyaw, Kwadwo A.;Heckelman, Lauren N.;DeFrate, Louis E.
通讯作者：
DeFrate, Louis E.
影响因子：
3
作者：
Paletta, GA;Warner, JJP;Altchek, DW
通讯作者：
Altchek, DW
影响因子：
1.8
作者：
Murray, IA;Johnson, GR
通讯作者：
Johnson, GR
影响因子：
2.4
作者：
Taylor, K. A.;Cutcliffe, H. C.;DeFrate, L. E.
通讯作者：
DeFrate, L. E.