Département de Kinanthropologie, Université du Québec à Montréal, Montréal, Que., Canada.
Clin Neurophysiol. 2010 May;121(5):734-43. doi: 10.1016/j.clinph.2009.11.083. Epub 2010 Feb 24.
Verify whether a unilateral physiological tremor modulation attempt has a bilateral effect on central oscillators responsible for physiological tremor.
Bilateral finger physiological tremor was recorded in 35 right-handed participants with laser displacement sensors in: (A) control condition, (B) modulation attempt of physiological tremor of the right index finger, (C) modulation attempt of physiological tremor of the right index finger by using co-contraction as a means to stabilize the finger.
Physiological tremor amplitude was significantly reduced between the control and modulation conditions for the right index finger. Physiological tremor amplitude was also significantly reduced for the left index finger. Regression analysis of oscillation amplitudes showed little relationship between both fingers, even during modulation attempts. The lack of relationship between fingers is also evident by low coherence values obtained in the control and modulation conditions. The coherence in the co-activation condition was significantly higher, albeit still low, in each frequency band.
Our results confirm that physiological tremor can be voluntarily reduced, and this reduction is bilateral. The modulation attempt did not however increase the frequency relationship between both sides.
A central command aiming at modulating tremor amplitude will not increase the synchronization between oscillators responsible for the central components of physiological tremor.
验证单侧生理震颤调制尝试是否对负责生理震颤的中枢振荡器产生双侧效应。
使用激光位移传感器在 35 名右利手参与者中记录双侧手指生理震颤：（A）对照条件下，（B）右食指生理震颤调制尝试，（C）使用协同收缩稳定手指的方式进行右食指生理震颤调制尝试。
与对照条件相比，右食指的生理震颤幅度在调制尝试中显著降低。左食指的生理震颤幅度也显著降低。对振荡幅度的回归分析表明，即使在调制尝试期间，两个手指之间也几乎没有关系。即使在调制条件下，相干值也很低，这表明手指之间缺乏关系。在协同激活条件下，相干性虽然仍然较低，但在每个频带中都显著增加。
我们的结果证实，生理震颤可以被自愿降低，并且这种降低是双侧的。然而，调制尝试并没有增加两侧之间的频率关系。
旨在调制震颤幅度的中枢命令不会增加负责生理震颤中枢成分的振荡器之间的同步性。
