{
  "abstract": "Antarctic polar night brings extreme light deprivation, prolonged isolation and severe circadian disruption, yet longitudinal resting-state electroencephalography (EEG) signatures reflecting neurophysiological alterations in this harsh environment remain poorly characterized. In this exploratory longitudinal research, resting-state EEG recordings with eyes open (EO) and eyes closed (EC) were acquired from 16 Antarctic expeditioners at four mission stages: pre-departure, pre-polar-night, early post-polar-night, and austral summer. Linear mixed-effects models with false discovery rate correction were applied to analyze delta eyes-closed/open differentiation (the EC–EO delta log-power difference), delta sub-bands, aperiodic spectral features, entropy, EEG microstates and delta-band functional connectivity. The delta EC–EO difference exhibited consistent, progressively negative shifts in parietal, frontal, whole-brain and occipital regions across the expedition timeline, with the most pronounced shifts observed in recordings obtained during and after the polar-night period; this effect spanned all slow, mid and fast delta sub-bands. Secondary mild temporal variations were observed in aperiodic spectral metrics, occipital sample entropy and global delta connectivity, whereas EEG microstates displayed no significant longitudinal alterations. Collectively, the delta EC–EO difference emerges as a candidate EEG index of resting-state condition differentiation in the low-frequency range, pending validation in larger studies with synchronized behavioral, physiological, and environmental measures.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Neurology, Shanghai East Hospital, School of Medicine, Tongji University , ,",
    "Department of Neurology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine , ,",
    "Research Center for Translational Medicine, Shanghai East Hospital, School of Medicine, Tongji University , ,",
    "Department of Neurology and Neurological Rehabilitation, Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Tongji University School of Medicine , ,"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Weiting Yang"
    },
    {
      "affs": [
        1
      ],
      "name": "Haoxin Tian"
    },
    {
      "affs": [
        2
      ],
      "name": "Guangming Xie"
    },
    {
      "affs": [
        1
      ],
      "name": "Ying Xu"
    },
    {
      "affs": [
        1
      ],
      "name": "Qinwen Wang"
    },
    {
      "affs": [
        0
      ],
      "name": "You Yin"
    },
    {
      "affs": [
        3
      ],
      "name": "Wuchao Liu"
    },
    {
      "affs": [
        1
      ],
      "name": "Yanyan Jiang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/54cr3res5wjh8.bib",
  "cited_by": 0,
  "doi": "10.3389/fnins.2026.1944325",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13672630/?tool=EBI",
  "id": "54cr3res5wjh8",
  "issns": [
    "1662-4548",
    "1662-453X"
  ],
  "landing_url": "https://europepmc.org/article/PMC/PMC13672630",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2805|Neural dynamics and brain function"
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  ],
  "openalex": "W7215863097",
  "pdf_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13672630/pdf/?tool=EBI",
  "pmcid": "PMC13672630",
  "pmid": null,
  "published": "2026-10-02",
  "publisher": "Frontiers Media SA",
  "ris": "https://research.draconitic.com/paper/54cr3res5wjh8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:18Z",
      "native_id": "PMC:PMC13672630",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13672630"
    },
    {
      "first_seen": "2026-10-30T12:19:23Z",
      "native_id": "10.3389/fnins.2026.1944325",
      "source": "crossref",
      "url": "https://www.frontiersin.org/articles/10.3389/fnins.2026.1944325/full"
    }
  ],
  "subjects": [
    {
      "field": "biology",
      "origin": "openalex:2805|Neural dynamics and brain function",
      "subfield": "neuroscience"
    }
  ],
  "title": "Longitudinal changes in resting-state EEG eyes-closed/open delta differentiation during an Antarctic expedition",
  "title_text": "Longitudinal changes in resting-state EEG eyes-closed/open delta differentiation during an Antarctic expedition",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:23Z",
  "url": "https://research.draconitic.com/paper/54cr3res5wjh8",
  "venue": "Frontiers in neuroscience",
  "versions": []
}