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首页> 外文期刊>Gait & posture >Change in the natural head-neck orientation momentarily altered sensorimotor control during sensory transition
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Change in the natural head-neck orientation momentarily altered sensorimotor control during sensory transition

机译：在感觉过渡期间，自然头颈方向的变化瞬间改变了感觉电流控制

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Achilles tendon vibration generates proprioceptive information that is incongruent with the actual body position; it alters the perception of body orientation leading to a vibration -induced postural response. When a person is standing freely, vibration of the Achilles tendon shifts the internal representation of the verticality backward thus the vibration-induced postural response realigned the whole body orientation with the shifted subjective vertical. Because utricular otoliths information participates in the creation of the internal representation of the verticality, changing the natural orientation of the head-neck system during Achilles tendon vibration could alter the internal representation of the earth vertical to a greater extent. Consequently, it was hypothesized that compared to neutral head-neck orientation, alteration in the head-neck orientation should impair balance control immediately after Achilles tendon vibration onset or offset (i.e., sensory transition) as accurate perception of the earth vertical is required. Results revealed that balance control impairment was observed only immediately following Achilles tendon vibration offset; both groups with the head-neck either extended or flexed showed larger body sway (i.e., larger root mean square scalar distance between the center of pressure and center of gravity) compared to the group with the neutral head-neck orientation. The fact that balance control was uninfluenced by head-neck orientation immediately following vibration onset suggests the error signal needs to accumulate to a certain threshold before the internal representation of the earth vertical becomes incorrect. (C) 2017 Elsevier B.V. All rights reserved.
机译：Achilles肌腱振动产生了与实际体位不一致的原野浮雕信息;它改变了体内取向的感知导致振动诱导的姿势反应。当一个人自由地站立时，Achilles肌腱的振动向后移动垂直度的内部表示，因此振动引起的姿势响应与移位的主观垂直造成全身取向。由于Utricular otoliths信息参与创建垂直性的内部表示，因此在阿基里斯肌腱振动期间改变头部颈部系统的自然取向可以在更大程度上改变地球的内部表示。因此，与中性头颈取向相比，与中性头颈取向相比，在需要肌腱振动发作或偏移（即，感官转变）之后，抬头紧接在需要偏移（即，感官转变）时，应尽可能地损害平衡控制。结果表明，仅在阿基里斯肌腱振动偏移后立即观察到平衡控制障碍;与具有中性头颈取向的组相比，两组延伸或弯曲显示较大的身体摇摆（即，重心的压力中心之间的较大的根均线标量距离。平衡控制在振动发作后立即通过头颈取向毫无突出的事实表明，在地球垂直的内部表示不正确之前，误差信号需要累积到某个阈值。 （c）2017 Elsevier B.v.保留所有权利。

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