The Ia afferent feedback of a given movement evokes the illusion of the same movement when returned to the subject via muscle tendon vibration
The Ia afferent feedback of a given movement evokes the illusion of the same movement when returned to the subject via muscle tendon vibration
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DOI：
10.1007/s00221-005-0325-2
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发表时间：
2006-06-01
影响因子：
2
通讯作者：
Roll, Jean-Pierre
中科院分区：
文献类型：
--
作者：
Albert, Frederic;Bergenheim, Mikael;Roll, Jean-Pierre
本研究的目的是进一步研究初级肌梭反馈对本体感觉和高级脑功能（如运动轨迹识别）的贡献。为了这个目的，复杂的错觉运动被诱发的科目应用模式的肌腱振动模仿自然Ia传入模式。IA传入信息先前记录使用显微神经摄影方法从六个主要肌肉群作用于踝关节在强加的“写”的运动。计算每个肌肉群的平均Ia传入模式，并将其用作引导每个振动器的模板。11种不同的振动模式应用于10名志愿者。受试者被要求用手在数字化平板电脑上复制所感知的虚幻运动，并识别和命名相应的图形符号。结果表明，Ia传入反馈的一个给定的运动唤起的错觉，相同的运动时，它被施加到受试者通过适当的模式的肌肉肌腱振动。施加的和虚幻的运动的几何形状和运动学参数是非常相似的，所谓的“三分之二的权力法律”是目前在振动引起的虚幻运动的再现。在Ia纤维发射的“自然”频率范围内的振动（约30 Hz）在所有测试对象中产生清晰的运动错觉。此外，增加振动模式的平均频率导致错觉运动的大小线性增加。最后，在83%的实验中，受试者能够识别和命名由振动引起的初级肌梭传入模式引起的符号。这些发现表明，一个给定的运动的“本体感受签名”与相应的“感知签名”。在“神经元群体向量模型”的一般框架下，讨论了感觉到知觉转换的神经机制。
The aim of the present study was to further investigate the contribution of primary muscle spindle feedback to proprioception and higher brain functions, such as movement trajectory recognition. For this purpose, complex illusory movements were evoked in subjects by applying patterns of muscle tendon vibration mimicking the natural Ia afferent pattern. Ia afferent messages were previously recorded using microneurographic method from the six main muscle groups acting on the ankle joint during imposed "writing like" movements. The mean Ia afferent pattern was calculated for each muscle group and used as a template to pilot each vibrator. Eleven different vibratory patterns were applied to ten volunteers. Subjects were asked both to copy the perceived illusory movements by hand on a digitizing tablet and to recognize and name the corresponding graphic symbol. The results show that the Ia afferent feedback of a given movement evokes the illusion of the same movement when it is applied to the subject via the appropriate pattern of muscle tendon vibration. The geometry and the kinematic parameters of the imposed and illusory movements are very similar and the so-called "two-thirds power law" is present in the reproduction of the vibration-induced illusory movements. Vibrations within the "natural" frequency range of Ia fibres firing (around 30 Hz) produce clear illusions of movements in all the tested subjects. In addition, increasing the mean frequency of the vibration patterns resulted in a linear increase in the size of the illusory movements. Lastly, the subjects were able to recognize and name the symbols evoked by the vibration-induced primary muscle spindle afferent patterns in 83% of the trials. These findings suggest that the "proprioceptive signature" of a given movement is associated with the corresponding "perceptual signature". The neural mechanisms possibly underlying the sensory to perceptual transformation are discussed in the general framework of "the neuronal population vector model".