Evidence map›Paper›PMID 34381340›Full record

ArticleFrontiers in human neuroscience2021

The Menstrual Cycle Alters Resting-State Cortical Activity: A Magnetoencephalography Study.

Rika Haraguchi, Hideyuki Hoshi, Sayuri Ichikawa, Mayuko Hanyu, Kohei Nakamura, Keisuke Fukasawa, Jesús Poza, Víctor Rodríguez-González, Carlos Gómez, Yoshihito Shigihara

Open access · goldAbstract read
In one paragraph

Article in Frontiers in human neuroscience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
2.8field-weighted citation impact, top 9% of its field
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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Endocrine modulation of cortical and retinal baseline perfusion across the menstrual cycle.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 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

10 authors at 5 institutions in 2 countries.

Rika HaraguchiClinical Laboratory, Kumagaya General Hospital, Kumagaya, Japan.
Hideyuki HoshiPrecision Medicine Centre, Hokuto Hospital, Obihiro, Japan.
Sayuri IchikawaClinical Laboratory, Kumagaya General Hospital, Kumagaya, Japan.
Mayuko HanyuDepartment of Gynaecology, Kumagaya General Hospital, Kumagaya, Japan.
Kohei NakamuraDepartment of Gynaecology, Kumagaya General Hospital, Kumagaya, Japan.
Keisuke FukasawaClinical Laboratory, Kumagaya General Hospital, Kumagaya, Japan.
Jesús PozaBiomedical Engineering Group, Higher Technical School of Telecommunications Engineering, University of Valladolid, Valladolid, Spain.
Víctor Rodríguez-GonzálezBiomedical Engineering Group, Higher Technical School of Telecommunications Engineering, University of Valladolid, Valladolid, Spain.
Carlos GómezBiomedical Engineering Group, Higher Technical School of Telecommunications Engineering, University of Valladolid, Valladolid, Spain.
Yoshihito ShigiharaPrecision Medicine Centre, Hokuto Hospital, Obihiro, Japan.
Saitama Prefectural Kumagaya Girls High School · JPUniversidad de Valladolid · ESBiomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine · ESHokuto Hospital · JPKeio University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Resting-state neural oscillations are used as biomarkers for functional diseases such as dementia, epilepsy, and stroke. However, accurate interpretation of clinical outcomes requires the identification and minimisation of potential confounding factors. While several studies have indicated that the menstrual cycle also alters brain activity, most of these studies were based on visual inspection rather than objective quantitative measures. In the present study, we aimed to clarify the effect of the menstrual cycle on spontaneous neural oscillations based on quantitative magnetoencephalography (MEG) parameters. Resting-state MEG activity was recorded from 25 healthy women with normal menstrual cycles. For each woman, resting-state brain activity was acquired twice using MEG: once during their menstrual period (MP) and once outside of this period (OP). Our results indicated that the median frequency and peak alpha frequency of the power spectrum were low, whereas Shannon spectral entropy was high, during the MP. Theta intensity within the right temporal cortex and right limbic system was significantly lower during the MP than during the OP. High gamma intensity in the left parietal cortex was also significantly lower during the MP than during the OP. Similar differences were also observed in the parietal and occipital regions between the proliferative (the late part of the follicular phase) and secretory phases (luteal phase). Our findings suggest that the menstrual cycle should be considered to ensure accurate interpretation of functional neuroimaging in clinical practice.

Indexed as

menstrual cyclequantitative spectral parametersregional oscillatory intensityrepresentative valuespontaneous neural oscillation

Identifiers

PMID34381340
PMCPMC8350571
OpenAlexW3184272708

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.