Where's your head at? An illusion of head orientation which reveals dissociation of proprioceptive signals for balance versus perception
Where's your head at? An illusion of head orientation which reveals dissociation of proprioceptive signals for balance versus perception
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你的头在哪里？
DOI：
10.1113/jp273874
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Reynolds R
中科院分区：
文献类型：
--
作者：
Reynolds R
前庭器官提供头部运动的信号，可用于稳定平衡。由于它被锁定在头骨内，它提供的信息必须首先从头部转换到身体中心坐标。这需要准确的头部方向感。例如，如果在面朝前站立时检测到朝向左耳的头部运动，则适当的响应将是在垂直方向上的补偿性身体摇摆。但如果头部转向右肩，同样的前庭反馈模式现在会指示身体向前摇摆，而适当的反应则指向后方。头部定向感觉的任何错误都可能导致代偿性摇摆反应定向在错误的方向上，从而导致姿势不稳定。这种从头到脚的坐标转换过程先前已经使用前庭电刺激（EVS）证明。EVS将小电流施加到调节前庭神经活动的乳突。这会导致头部（和身体）向阴极运动的错误感觉，反过来又会导致对阳极的补偿性摇摆反应（菲茨帕特里克& Day，2004）。当头部向左或向右转动时，诱发的摇摆响应的方向旋转相等的量，保持固定在头部坐标内，总是沿着穿过耳朵的轴定向。在这一期的《生理学杂志》上，道尔顿等人。（2017）描述了一个有趣的场景，在这个场景中，这种转变过程出错了。
The vestibular apparatus provides signals of head motion that can be used to stabilise balance. Since it is locked within the skull, the information it provides must first be transformed from head to body-centred coordinates. This requires an accurate sense of head orientation. For example, if head motion is detected towards the left ear when standing face-forwards, the appropriate response would be a compensatory body sway in a rightward direction. But if the head is turned towards our right shoulder, the same pattern of vestibular feedback would now indicate forward body sway, with the appropriate response being directed backward. Any errors in the sensation of head orientation may cause the compensatory sway response to be oriented in the wrong direction, leading to postural instability. This head-to-feet coordinate transformation process has previously been demonstrated using electrical vestibular stimulation (EVS). EVS applies small currents to the mastoid processes that modulate activity in the vestibular nerve. This leads to a false sensation of head (and body) motion towards the cathode electrode that, in turn, leads to a compensatory sway response towards the anode (Fitzpatrick & Day, 2004). As the head is turned left or right, the direction of the evoked sway response rotates by an equal amount, staying fixed within head coordinates, always directed along an axis through the ears. In this issue of The Journal of Physiology, Dalton et al.(2017) describe an intriguing scenario in which this transformation process goes awry.
[人类适应长时间静态头部转动过程中前庭运动反应方向的变化]。
DOI：
--
发表时间：
1989
期刊：
Neirofiziologiia = Neurophysiology
影响因子：
--
作者：
V. Gurfinkel;K. Popov;B. Smetanin;V. I. Shlykov
通讯作者：
V. I. Shlykov
影响因子：
5.5
作者：
Dalton, Brian H.;Rasman, Brandon G.;Blouin, Jean-Sebastien
通讯作者：
Blouin, Jean-Sebastien
人类适应长时间静态转头过程中前庭运动反应方向的变化
DOI：
--
发表时间：
2005
期刊：
Neurophysiology (New York)
影响因子：
--
作者：
V. Gurfinkel;K. Popov;B. Smetanin;V. Y. Shlykov
通讯作者：
V. Y. Shlykov