Global field power helps separate respiratory-related evoked potentials from EMG contamination.
Global field power helps separate respiratory-related evoked potentials from EMG contamination.
复制标题
全球场功率有助于将呼吸相关诱发电位与肌电图污染分开。
DOI：
10.1152/jappl.2000.88.1.282
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Akay,M
中科院分区：
文献类型：
--
作者：
Daubenspeck,JA;Lim,LM;Akay,M
在12名受试者中，通过在吸气开始时施加的简短（200 ms）口腔压力脉冲（−10 cmH2O）刺激呼吸相关诱发电位（RREP）。头皮电位测量在30个网站上的矩形网格，包括右侧的头皮覆盖的体感皮层（SSC）。同时和显着的咬肌肌电图（mEMG）活动引起的压力脉冲，我们发现相关的证据污染的RREP的mEMG。全局场功率（GFP）用于提供SSC激活的稳健的、独立于参考的测量，其提供与mEMG污染的部分绝缘。从所有受试者的平均GFP，从呼吸机械感受器的传入信息的反射，表现出一个潜伏期到发病的显着传入SSC活动的0.25毫秒。头皮GFP活动在对照实验（没有施加压力）是显着的，并可能反映正在进行的传入活动从吸气。
Respiratory-related evoked potentials (RREPs) were stimulated by brief (200-ms) oral pressure pulses (−10 cmH2O) applied at the onset of inspiration in 12 subjects. Scalp potentials were measured at 30 sites on a rectangular grid that encompassed the right side of the scalp overlying the somatosensory cortex (SSC). Concurrent and significant masseter EMG (mEMG) activity was evoked by the pressure pulse, and we found correlational evidence for contamination of the RREP by the mEMG. The global field power (GFP) was used to provide a robust, reference-independent measure of SSC activation that provided partial insulation from mEMG contamination. The mean GFP from all subjects, reflective of afferent information from respiratory mechanoreceptors, showed a latency to onset of significant afferent SSC activity of ∼25 ms. Scalp GFP activity during control experiments (absence of applied pressure) was significant and may reflect ongoing afferent activity from inspiration.