Faculty of Health Education and Social Work, Physiotherapy, Sør-Trøndelag University College, Trondheim, Norway.
Gait Posture. 2013 Sep;38(4):918-22. doi: 10.1016/j.gaitpost.2013.04.017. Epub 2013 May 28.
There is evidence that patients with psychotic conditions display greater center of pressure (CoP) displacement during quite standing than healthy subjects, but the underlying impairments in the control mechanisms are uncertain. The aim of this study was to identify the nature of possible impairments in the control of posture by modulation of visual and kinesthetic information during quiet standing. Center of pressure (CoP) data and whole-body kinematics of the center of mass (CoM) were recorded during quite standing on a firm surface with eyes open and with eyes closed, and standing with eyes open on a yielding surface. During all three conditions, patients displayed greater migration of CoM and CoP-CoM, a measure related to ankle joint torque, whereas CoP-frequency (MPF) was similar in patients and healthy subjects. Our results suggested that greater postural sway in patients may depend on disproportionally large ankle joint torque without corresponding increase in frequency. Furthermore, interactions between groups and conditions suggested that the patients made less use of visual information for postural control than the healthy subjects.
有证据表明，精神病患者在安静站立时的压力中心（CoP）位移大于健康受试者，但控制机制的潜在损伤尚不确定。本研究的目的是通过在安静站立时调节视觉和本体感觉信息，确定姿势控制中可能存在的损伤性质。在睁眼和闭眼时在坚固表面上以及在睁眼时在柔软表面上的安静站立期间记录压力中心（CoP）数据和质心（CoM）的整体运动。在所有三种情况下，患者的 CoM 和 CoP-CoM 迁移更大，这是与踝关节扭矩相关的一种测量方法，而 CoP 频率（MPF）在患者和健康受试者中相似。我们的结果表明，患者更大的姿势摆动可能取决于不成比例的大踝关节扭矩，而没有相应的频率增加。此外，组间和条件间的相互作用表明，患者在姿势控制中对视觉信息的利用程度低于健康受试者。
