Electrogastrography (EGG) is the noninvasive electrophysiological technique used to record gastric electrical activity by means of cutaneous electrodes placed on the abdomen. EGG has been so far mostly used in clinical studies in gastroenterology, but it represents an attractive method to study brain‐viscera interactions in psychophysiology. Compared to the literature on electrocardiography for instance, where practical recommendations and normative data are abundant, the literature on EGG in humans remains scarce. The aim of this article is threefold. First, we review the existing literature on the physiological basis of the EGG, pathways of brain‐stomach interactions, and experimental findings in the cognitive neuroscience and psychophysiology literature. We then describe practical issues faced when recording the EGG in young healthy participants, from data acquisition to data analysis, and propose a semi‐automated analysis pipeline together with associated MATLAB code. The analysis pipeline aims at identifying a regular rhythm that can be safely attributed to the stomach, through multiple steps. Finally, we apply these recording and analysis procedures in a large sample (N = 117) of healthy young adult male and female participants in a moderate (<5 hr) to prolonged (>10 hr) fasting state to establish the normative distribution of several EGG parameters. Our results are overall congruent with the clinical gastroenterology literature, but suggest using an electrode coverage extending to lower abdominal locations than current clinical guidelines. Our results indicate a marginal difference in EGG peak frequency between male and female participants, and that the gastric rhythm becomes more irregular after prolonged fasting.

中文翻译：

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用于心理生理学研究的胃电图：大样本中的实际考虑、分析流程和规范数据。


胃电图（EGG）是一种无创电生理技术，通过放置在腹部的皮肤电极来记录胃电活动。到目前为止，EGG 主要用于胃肠病学的临床研究，但它代表了一种在心理生理学中研究大脑与内脏相互作用的有吸引力的方法。例如，与心电图方面的文献相比，实用建议和规范数据丰富，但有关人类 EGG 的文献仍然很少。本文的目的有三个。首先，我们回顾了有关 EGG 生理学基础、脑胃相互作用途径以及认知神经科学和心理生理学文献中的实验结果的现有文献。然后，我们描述了在年轻健康参与者中记录 EGG 时所面临的实际问题，从数据采集到数据分析，并提出了一个半自动分析流程以及相关的 MATLAB 代码。该分析流程旨在通过多个步骤确定可以安全地归因于胃的规律节律。最后，我们将这些记录和分析程序应用于处于中度（<5 id=52>10 小时）禁食状态的健康年轻成年男性和女性参与者的大样本（ N = 117）中，以建立几个 EGG 参数的规范分布。我们的结果总体上与临床胃肠病学文献一致，但建议使用比当前临床指南延伸至下腹部位置的电极覆盖范围。我们的结果表明，男性和女性参与者之间的 EGG 峰值频率存在边际差异，并且长时间禁食后胃节律变得更加不规则。