Proprioceptive illusions created by vibration of one arm are altered by vibrating the other arm
Proprioceptive illusions created by vibration of one arm are altered by vibrating the other arm
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DOI：
10.1007/s00221-014-3911-3
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发表时间：
2014-07-01
影响因子：
2
通讯作者：
Homma, Ikuo
中科院分区：
文献类型：
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作者：
Hakuta, Naoyuki;Izumizaki, Masahiko;Homma, Ikuo
有证据表明，来自双臂的信号被用来确定一只手臂的感知位置和运动。我们研究了蒙眼参与者（n = 26）一只手臂（参考）的位置感和运动感是否会因另一只手臂（指示）肌肉纺锤波信号的增加而改变。为了增加肌肉主轴放电，我们对指示臂的肘关节屈肌施加70-80 Hz的肌肉振动。在第一个实验中，比较了在前臂位置匹配任务中，指示臂肘关节屈肌振动和不振动两种情况下，振动参照臂的本体感觉错觉。我们发现，参考臂屈肘肌振动引起的臂伸振动错觉在指示臂屈肘肌振动的存在下有所减少。在第二个实验中，参与者被要求描述他们对参考臂肘屈肌振动引起的参考臂前臂伸展运动错觉的感知，以响应非参考臂肘屈肌振动的开/关和开/开转换。当非参考臂肘关节屈肌的振动被打开时，他们报告了参考臂错觉的减速感。当它被关闭时，他们报告了一种加速的感觉。综上所述，本研究表明，一只手臂的肢体位置感和肢体运动感都在一定程度上依赖于来自另一只手臂的纺锤波信号。
There is some evidence that signals coming from both arms are used to determine the perceived position and movement of one arm. We examined whether the sense of position and movement of one (reference) arm is altered by increases in muscle spindle signals in the other (indicator) arm in blindfolded participants (n = 26). To increase muscle spindle discharge, we applied 70-80 Hz muscle vibration to the elbow flexors of the indicator arm. In a first experiment, proprioceptive illusions in the vibrated reference arm in a forearm position-matching task were compared between conditions in which the indicator arm elbow flexors were vibrated or not vibrated. We found that the vibration illusion of arm extension induced by vibration of reference arm elbow flexors was reduced in the presence of vibration of the indicator elbow flexors. In a second experiment, participants were asked to describe their perception of the illusion of forearm extension movements of the reference arm evoked by vibration of reference arm elbow flexors in response to on/off and off/on transitions of vibration of non-reference arm elbow flexors. When vibration of non-reference arm elbow flexors was turned on, they reported a sensation of slowing down of the illusion of the reference arm. When it was turned off, they reported a sensation of speeding up. To conclude, the present study shows that both the sense of limb position and the sense of limb movement of one arm are dependent to some extent on spindle signals coming from the other arm.