Figure 2

![Figure 2: EEG spectral analysis comparing slow-wave activity between essential oil stimulation and control conditions during sleep reveals frequency-band differences. Enhanced delta power is observed during aroma exposure.](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7806966/bin/41598_2020_80171_Fig2_HTML.jpg)

> Source: Li-Wei Ko et al. "A pilot study on essential oil aroma stimulation for enhancing slow-wave EEG in ." *Scientific reports*, 2021. PMID: [33441798](https://pubmed.ncbi.nlm.nih.gov/33441798/)

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  <img src="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7806966/bin/41598_2020_80171_Fig2_HTML.jpg" alt="EEG spectral analysis comparing slow-wave activity between essential oil stimulation and control conditions during sleep reveals frequency-band differences. Enhanced delta power is observed during aroma exposure." />
  <figcaption>Figure 2. EEG spectral analysis comparing slow-wave activity between essential oil stimulation and control conditions during sleep reveals frequency-band differences. Enhanced delta power is observed during aroma exposure.<br>  Source: Li-Wei Ko et al. "A pilot study on essential oil aroma stimulation for enhancing slow-wave EEG in ." <em>Scientific reports</em>, 2021. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/33441798/">33441798</a></figcaption>
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