Investigation of reconstitution timing of sensory reference frame during sit-to-stand using various sensory stimuli

四种感觉刺激（对肱三头肌表面和前足的振动、前庭和视觉的振动）在安静站立时引起对侧的姿势反应，在坐姿到站立的不同阶段进行。研究结果如下：(1)在坐转站开始前的刺激过程中，被试的体位反应与安静站立时的刺激引起的体位反应是对侧的。这建议在坐立开始前，预估目标站立点，并在站立点重新构建感官参考框架。这种现象在肱三头肌表面的振动中表现得最为明显。2)在不同的感觉刺激下，站立动作中感觉信息的使用方式是不同的。3)到达站立点的知觉和到达后的位置知觉有两种感觉信息，个体差异较大。

Four kinds of sensory stimulation (vibration to the triceps surae and forefoot, vestibule, and vision), which induce postural responses contralateral to the disturbance while quiet standing, were applied in various phases while sit-to-standing. The following findings were obtained. 1) In the stimulation until the start of sit-to-standing, postural responses contralateral to the postural responses induced by the stimulation during quiet standing were evoked. This suggests to anticipate the aimed standing point before the start of sit-to-stand and to recompose the sensory reference frame at the standing point. This phenomenon was most clear in the vibration to the triceps surae. 2) The way to use the sensory information during the stand-up action is different in each sensory stimulus. 3) There are two kinds of the sensory information used for the perception of the reaching to the standing point and the positional perception after the reaching, observing the large individual differences.