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<p>Previous studies have suggested that the encoding of emotional content of facial expressions (ECFEs) is related to several event-related potential (ERP) components. This study addresses this issue intensively by observing ERPs associated with active encoding during a working memory (WM) task. Thirty-one students (14 males) from a university participated in this ERP study. Synthesized pictures of faces expressing Ekman’s seven basic emotions were used as both encoding and interfering stimuli in the WM task. Differences in ERP amplitudes between the two conditions of encoding and interfering were examined using paired t-tests, which were data-driven performing to avoid omitting effects not appearing in typical ERP components. Mean signals of the significant clusters were extracted to conduct correlation analyses with participants’ retrieval accuracy and speed. Temporal and regional specific clusters showing discrepancies in the amplitude of electrical potentials were identified. Specifically, clusters were found at 100–105&#xa0;ms (occipital midline), 145–170&#xa0;ms (occipital midline), 225–250&#xa0;ms (frontal midline and central midline areas), and 315–400&#xa0;ms (occipital midline), all surpassing the threshold of <i>P</i> = 0.05 with family-wise error rate correction across the whole scalp-time scale. Furthermore, mean signals of early and intermediate sensory clusters were correlated with the participants’ retrieval accuracy and /or speed. Our findings underscore the involvement of classic early and late face processing stages, particularly intermediate higher-order cognitive stages, in this complex cognitive function. Additionally, our findings suggest specific roles for these significant cluster related brain modules within this cognitive process.</p>

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Active encoding of facial emotions during a working memory task: an ERP study

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Guodong Wang,
  • Jiawu Ji,
  • Donghong Jiang,
  • Saizheng Weng,
  • Huasheng Duan,
  • Lili Nie

摘要

Previous studies have suggested that the encoding of emotional content of facial expressions (ECFEs) is related to several event-related potential (ERP) components. This study addresses this issue intensively by observing ERPs associated with active encoding during a working memory (WM) task. Thirty-one students (14 males) from a university participated in this ERP study. Synthesized pictures of faces expressing Ekman’s seven basic emotions were used as both encoding and interfering stimuli in the WM task. Differences in ERP amplitudes between the two conditions of encoding and interfering were examined using paired t-tests, which were data-driven performing to avoid omitting effects not appearing in typical ERP components. Mean signals of the significant clusters were extracted to conduct correlation analyses with participants’ retrieval accuracy and speed. Temporal and regional specific clusters showing discrepancies in the amplitude of electrical potentials were identified. Specifically, clusters were found at 100–105 ms (occipital midline), 145–170 ms (occipital midline), 225–250 ms (frontal midline and central midline areas), and 315–400 ms (occipital midline), all surpassing the threshold of P = 0.05 with family-wise error rate correction across the whole scalp-time scale. Furthermore, mean signals of early and intermediate sensory clusters were correlated with the participants’ retrieval accuracy and /or speed. Our findings underscore the involvement of classic early and late face processing stages, particularly intermediate higher-order cognitive stages, in this complex cognitive function. Additionally, our findings suggest specific roles for these significant cluster related brain modules within this cognitive process.