Maurer C, Mergner T, Bolha B, Hlavacka F
Neurologische Klinik, Neurozentrum, Universität Freiburg, Breisacher Strasse 64, D-79106, Freiburg, Germany.
Neurosci Lett. 2000 Mar 10;281(2-3):99-102. doi: 10.1016/s0304-3940(00)00814-4.
We investigated the changes of human posture control of upright stance which occur when vestibular cues (VEST) are absent and visual and somatosensory orientation cues (VIS, SOM) are removed. Postural responses to sinusoidal tilts of a motion platform in the sagittal plane (+/-2 degrees, f=0.05, 0.1, 0.2 and 0.4 Hz) were studied in normal subjects (Ns) and patients with bilateral vestibular loss (Ps). We found that absence of VEST (Ps, visual reference) and removal of VIS (Ns, no visual reference) had little effect on stabilization of upright body posture in space. In the absence of both VEST and VIS (Ps, no visual reference) somatosensory graviception still provided some information on body orientation in space at 0.05 and 0.1 Hz. However, at the higher frequencies Ps qualitatively changed their behavior; they then tended to actively align their bodies with respect to the motion platform. The findings confirm predictions of a novel postural control model.
我们研究了在前庭线索（VEST）缺失且视觉和本体感觉定向线索（VIS、SOM）被移除时，人体直立姿势控制的变化。在正常受试者（Ns）和双侧前庭丧失患者（Ps）中，研究了对矢状面运动平台正弦倾斜（±2度，f = 0.05、0.1、0.2和0.4赫兹）的姿势反应。我们发现，前庭线索缺失（Ps，视觉参考）和视觉线索移除（Ns，无视觉参考）对空间中直立身体姿势的稳定影响很小。在前庭线索和视觉线索都缺失的情况下（Ps，无视觉参考），本体感觉重力感知在0.05和0.1赫兹时仍能提供一些关于身体在空间中定向的信息。然而，在较高频率时，Ps的行为发生了质的变化；然后他们倾向于使身体相对于运动平台主动对齐。这些发现证实了一种新型姿势控制模型的预测。
