UNASSIGNED:了解前屈过程中冈上肌(SSP)和冈下肌(ISP)解剖亚区的形态和功能差异将为肩关节疾病的管理提供有用的信息。这项研究的目的是调查SSP和ISP肌肉亚区在肩关节前屈过程中是否表现出独立的作用。
UNASSIGNED:本研究招募了8名没有肩关节限制的健康男性志愿者。参与者被指示坐在椅子上,背部靠在靠背上。在SSP和ISP肌肉亚区上使用剪切波弹性成像测量剪切模量(kPa)作为肌肉硬度的替代。非优势臂的主动测量是在中立位置的等距收缩期间以及在前屈时从30°到150°的每15°间隔获得的。Friedman检验和Dunn'sposthoc检验用于评估每个肌肉分区前屈过程中角度之间测量结果的差异。
UNASSIGNED:前屈过程中SSP肌肉前中次区域的主动僵硬结果从30°增加到45°,达到182.4±32.1kPa(P<.001)。SSP肌肉的前浅亚区的刚度在30°(125.0±20.6kPa;P<.019)处最高,并随着肩角位置的增加而线性下降至105°。上级的刚度,中间,ISP肌肉的下区域呈现山形趋势,90°处峰值为99.9±23.5kPa(P<.013),90°144.2±11.2kPa(P<.013),105°时122.9±27.9kPa(P<.007),分别。最后,三角肌胸大肌和前区的刚度结果呈山形趋势,在60°时达到89.4±23.5kPa(P<.007),在90°时达到176.7±22.9kPa(P<.026),分别。
UNASSIGNED:SSP和ISP肌肉亚区在主动前屈运动中起着重要作用。虽然紧密重叠,肌肉子区域的活动在前屈运动范围内发生变化,从初始运动范围的SSP肌肉的活跃的前浅区域开始,从ISP肌肉的活跃的下亚区域开始。SSP和ISP亚区在前屈时没有表现出独立的功能行为。
UNASSIGNED: Knowledge of the morphological and functional differences in the anatomic subregions of the supraspinatus (SSP) and infraspinatus (ISP) muscles during forward flexion will provide useful information in the management of shoulder joint disorders. The purpose of this
study was to investigate whether the SSP and ISP muscle subregions exhibit independent roles during forward flexion of the shoulder joint.
UNASSIGNED: Eight healthy male volunteers without any restriction in their shoulder joints were recruited for this
study. Participants were instructed to sit on a chair with their back against the backrest. Shear modulus (kPa) was measured as a surrogate for muscle stiffness using shear wave elastography on the SSP and ISP muscle subregions. Active measurements of the nondominant arm were obtained during isometric contraction at a neutral position and every 15° intervals from 30° to 150° during forward flexion. Friedman test and Dunn\'s post hoc test were used to evaluate differences in measurement outcomes among angles during forward flexion in each muscle subregion.
UNASSIGNED: Active stiffness outcomes of the anterior-middle subregion of the SSP muscle during forward flexion increased from 30° up to 45°, reaching a value of 182.4 ± 32.1 kPa (P < .001). Stiffness of the anterior-superficial subregion of the SSP muscle was highest at 30° (125.0 ± 20.6 kPa; P < .019) and linearly decreased up to 105° with increasing shoulder angle position. Stiffness of the superior, middle, and inferior subregions of ISP muscle presented a mountain-shaped trend, with peaks of 99.9 ± 23.5 kPa at 90° (P < .013), 144.2 ± 11.2 kPa at 90° (P < .013), and 122.9 ± 27.9 kPa at 105° (P < .007), respectively. Finally, the stiffness outcomes of the pectoralis major and anterior region of the deltoid muscles showed a mountain-shaped trend with peaks of 89.4 ± 23.5 kPa at 60° (P < .007) and 176.7 ± 22.9 kPa at 90° (P < .026), respectively.
UNASSIGNED: The SSP and ISP muscle subregions play a significant role during active forward flexion motion. While closely overlapped, the activity of the muscle subregions changed during the forward flexion motion range, starting with an active anterior-superficial subregion of the SSP muscle at the initial range of motion and an active inferior subregion of the ISP muscle toward midrange of motion. The SSP and ISP subregions did not demonstrate independent functional behavior during forward flexion.