Program in Physical Therapy, Washington University in St. Louis, St. Louis, MO, USA.
Exp Brain Res. 2010 May;203(1):221-6. doi: 10.1007/s00221-010-2208-4. Epub 2010 Mar 25.
Previous studies demonstrated a leaning after-effect (LAE) following standing or walking on an inclined surface consistent with a long-lasting, somatosensory memory for body orientation relative to the surface. Here, we asked whether providing a brief visual reference during LAE resets postural orientation to the new visual reference. The results showed that subjects immediately return to upright when eyes were opened briefly during the post-incline period. However, the subjects also immediately resumed leaning after closing their eyes again following 20 s of eyes open. The duration of LAE was not influenced by 1 or 2 brief periods of vision. Also, the amplitude of the lean following the brief vision period was often larger than when subjects had their eyes closed for the entire post-incline period. These results suggest a powerful somatosensory memory contribution to postural orientation in space that is not eliminated or recalibrated with brief exposure to a visual reference.
先前的研究表明，在倾斜表面上站立或行走后会出现倾斜后效（LAE），这与身体相对于表面的方向的长期体感记忆相一致。在这里，我们想知道在 LAE 期间提供短暂的视觉参考是否会将姿势重新调整到新的视觉参考。结果表明，当在倾斜后期间短暂睁开眼睛时，受试者会立即恢复直立。但是，当受试者再次闭眼 20 秒后，他们也会立即重新倾斜。LAE 的持续时间不受 1 或 2 次短暂视觉期的影响。此外，在短暂的视觉期后，倾斜的幅度通常比受试者在整个倾斜后期间闭眼时更大。这些结果表明，体感记忆在空间中的姿势定向中具有强大的作用，不会因短暂接触视觉参考而消除或重新校准。
