Evidence map›Paper›PMID 35166211›Full record

ArticleBiomedical journal2021

Modification of brain waves and sleep parameters by Citrus reticulata Blanco. cv. Sai-Nam-Phueng essential oil.

Jackapun Kwangjai, Dania Cheaha, Rodiya Manor, Nusaib Sa-Ih, Nifareeda Samerphob, Acharaporn Issuriya, Chatchai Wattanapiromsakul, Ekkasit Kumarnsit

Abstract read
In one paragraph

Article in Biomedical journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  3. A Novel Functional Ingredient Derived From a Mixture of Mulberry (Oxidative medicine and cellular longevity · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Jackapun KwangjaiDepartment of Physiology, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, Thailand.
Dania CheahaDepartment of Biology, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, Thailand; Research Unit for EEG Biomarkers of Neuronal Diseases, Prince of Songkla University, Songkhla, Thailand.
Rodiya ManorDepartment of Pre-clinic, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Pattani, Thailand.
Nusaib Sa-IhDepartment of Physiology, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, Thailand; Research Unit for EEG Biomarkers of Neuronal Diseases, Prince of Songkla University, Songkhla, Thailand.
Nifareeda SamerphobDepartment of Physiology, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, Thailand; Research Unit for EEG Biomarkers of Neuronal Diseases, Prince of Songkla University, Songkhla, Thailand.
Acharaporn IssuriyaDepartment of Physiology, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, Thailand; Research Unit for EEG Biomarkers of Neuronal Diseases, Prince of Songkla University, Songkhla, Thailand.
Chatchai WattanapiromsakulDepartment of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Songkhla, Thailand.
Ekkasit KumarnsitDepartment of Physiology, Faculty of Science, Prince of Songkla University, Hatyai, Songkhla, Thailand; Research Unit for EEG Biomarkers of Neuronal Diseases, Prince of Songkla University, Songkhla, Thailand. Electronic address: Kumarnsit.e@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCitrus essential oil (EO) has been used for mood elevation and sedative hypnotic purposes. However, scientific proofs of its central nervous system (CNS) action remained largely unexplored. This study investigated chemotypes, electrical brain waves and sleep-wake effects of the essential oil from Citrus reticulata in rat model.

methodsChemical contents of citrus EO were analyzed using gas chromatography-mass spectrometry (GC-MS). Male Wistar rats implanted with electrodes on the frontal and parietal skulls were used for electroencephalographic (EEG) recording while inhaling the citrus EO (200 μl on cotton wool). Diazepam (10 mg/kg, p.o.) was used as a standard anxiolytic drug. EEG frequency analyses were performed by using Fast Fourier transform. All data were statistical analyzed using One-way ANOVA followed by Tukey's test.

resultsGC-MS analysis revealed d-limonene (95.7%) as a major constituent of citrus EO. The EEG results showed that overall EEG patterns of citrus EO effects were relatively similar to that of diazepam. However, significant differences between treatments were seen from sleep-wake analyses. Diazepam significantly increased episode numbers of awake and non-rapid eye movement (REM) sleep and reduced averaged episode duration. On the other hand, the citrus EO significantly decreased REM sleep latency and increased total time and episode numbers of REM sleep.

conclusionThese findings demonstrated unique CNS effects of C. reticulata EO with EEG fingerprints and sleep-wake profiles. The data might be useful for citrus essential oil sub-classification and clinical application.

Indexed as

Brain WavesCitrusOils, VolatileAnimalsRatsRats, WistarSleepOils, VolatileCitrus reticulataEEGEssential oilGC/MSREM sleepSai-Nam-Phueng

Identifiers

PMID35166211
PMCPMC8847839

What OpenQuestion holds

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LicenceCC BY-NC-ND
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.