Siegler Alon, Pick Chaim G, Been Ella
Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Israel.
Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Israel; The Dr. Miriam and Sheldon G. Adelson Chair and Center for the Biology of Addictive Diseases, and Sagol School of Neuroscience, Tel Aviv University, Israel.
Gait Posture. 2019 Feb;68:476-482. doi: 10.1016/j.gaitpost.2018.12.042. Epub 2019 Jan 2.
Postural asymmetries may cause structural pathological conditions and impaired movement pattern. The influence of body position and awareness towards symmetry has not yet been elucidated. The aim of this study was twofold: First, to compare the body positional bilateral symmetry between standing and supine positions, and second, to examine whether the awareness to symmetry can modify posture perception and body positional bilateral symmetry.
We analyzed the degree of anterior postural alignment symmetry of 34 healthy subjects by photogrammetric method (three photographs in a standing position and three in a supine position). Each photo captured different state of awareness: Subjective Comfortable Posture (SCP), Subjective Perceived Symmetrical Posture (SPSP), and Guided Posture Protocol (GPP).
The standing position increased the symmetrical alignment of the neck (p < 0.013) and the upper limbs (p < 0.011). However, the supine position demonstrated increased symmetrical alignment of the upper trunk (p < 0.019) and the feet (p < 0.002). In the standing position, GPP showed greater symmetry of the neck (p < 0.022), the shoulders (p < 0.014), the thorax midline (p < 0.009), the upper trunk (p < 0.000) and the upper limbs (p < 0.029). No significant changes were observed in the supine position between the three states of awareness.
Study results indicate that the supine position shows greater degree of upper trunk's symmetrical alignment than the standing position. It also indicates that while standing, focusing attention into symmetry improves body positional bilateral symmetry. These results might have clinical implications when working with patients who suffer from asymmetric posture.
姿势不对称可能导致结构病理状况和运动模式受损。身体姿势和对对称性的认知的影响尚未阐明。本研究的目的有两个：第一，比较站立位和仰卧位时身体位置的双侧对称性；第二，研究对对称性的认知是否能改变姿势感知和身体位置的双侧对称性。
我们通过摄影测量法分析了34名健康受试者的前位姿势对齐对称程度（站立位三张照片，仰卧位三张照片）。每张照片捕捉不同的认知状态：主观舒适姿势（SCP）、主观感知对称姿势（SPSP）和引导姿势方案（GPP）。
站立位增加了颈部（p＜0.013）和上肢（p＜0.011）的对称对齐。然而，仰卧位显示上躯干（p＜0.019）和足部（p＜0.002）的对称对齐增加。在站立位，GPP显示颈部（p＜0.022）、肩部（p＜0.014）、胸中线（p＜0.009）、上躯干（p＜0.000）和上肢（p＜0.029）的对称性更高。仰卧位在三种认知状态之间未观察到显著变化。
研究结果表明，仰卧位上躯干的对称对齐程度高于站立位。这也表明，站立时，将注意力集中在对称性上可改善身体位置的双侧对称性。这些结果可能对治疗姿势不对称患者具有临床意义。
