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首页> 外文期刊>Journal of Neuroscience Methods >Effect of electrode cap on measured cortical motor threshold.
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Effect of electrode cap on measured cortical motor threshold.

机译：电极帽对测得的皮质运动阈值的影响。

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摘要

We investigated the role of electrode cap use in the determination of the cortical motor threshold (MT), and the resulting changes in the recorded motor evoked potentials (MEPs). We also tested whether the induced changes in determined MT could be corrected via previously introduced correction method. Sixteen healthy subjects were studied. Navigated TMS was used for mapping the optimal representation area of the thenar musculature in the primary motor cortex and individual MTs were determined with and without the use of the electrode cap. A mathematical correction was utilized to compensate for the effect of electrode cap in the MTs. Individual MEPs were also measured. We observed a significant (p<0.05) increase in the determined MTs attributable to the use of the electrode cap. At the group level this difference was reduced significantly (p<0.01) by the use of the correction method. However, at the individual level the efficiency of the correction was poor. The MEP-amplitudes were not affected whethermeasured with or without the electrode cap. The electrode cap affects significantly the cortical MT measured as stimulation intensity making the comparison of MTs difficult with other studies not having used an electrode cap.
机译：我们调查了电极帽的使用在确定皮层运动阈值（MT）以及记录的运动诱发电位（MEPs）方面的变化。我们还测试了是否可以通过先前引入的校正方法校正确定的MT中的诱导变化。研究了十六名健康受试者。使用导航的TMS绘制主要运动皮层中鱼鳞肌肉组织的最佳表示区域，并在使用和不使用电极帽的情况下确定单个MT。利用数学校正来补偿MT中电极盖的影响。还测量了各个MEP。我们观察到，归因于电极帽的使用，确定的MT显着增加（p <0.05）。在组一级，通过使用校正方法，该差异显着降低（p <0.01）。但是，在个人层面上，校正的效率很差。无论有无电极盖，MEP振幅均不受影响。电极帽会显着影响皮层MT的刺激强度，从而使MT与其他未使用电极帽的研究难以进行比较。

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