Evidence map›Paper›PMID 34272280›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Altered sense of self during seizures in the posteromedial cortex.

Josef Parvizi, Rodrigo M Braga, Aaron Kucyi, Mike J Veit, Pedro Pinheiro-Chagas, Claire Perry, Clara Sava-Segal, Michael Zeineh, Eric Klaas van Staalduinen, Jaimie M Henderson and 1 more

Open access · hybridAbstract readCase Reports
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 2 pooled it
5.3field-weighted citation impact, top 3% 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

27 citing papers in PubMed, 2 syntheses or guidelines pooled it, 57 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Ketamine reduces the neural distinction between self- and other-produced affective touch: a randomized double-blind placebo-controlled study.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2024
    Trial
  4. Mindful attention promotes control of brain network dynamics for self-regulation and discontinues the past from the present.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Trial
  5. Article
  6. Article
  7. Article
  8. Decide, act, reflect, and maybe a self in all this?Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  9. Article
  10. Dissociative Symptoms and Interoceptive Integration.Current topics in behavioral neurosciences · 2025
    Review
  11. Review
  12. Article
  13. Suspending the Embodied Self in Meditation Attenuates Beta Oscillations in the Posterior Medial Cortex.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article
  14. Review
  15. Article
  16. Article
  17. Review
  18. Article
  19. A tripartite view of the posterior cingulate cortex.Nature reviews. Neuroscience · 2023
    Review
  20. Review
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

11 authors at 1 institution in 1 country.

Josef ParviziStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305; jparvizi@stanford.edu.
Rodrigo M BragaStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305.
Aaron KucyiStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305.ORCID 0000-0001-6707-0028
Mike J VeitStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305.ORCID 0000-0002-0924-2108
Pedro Pinheiro-ChagasStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305.ORCID 0000-0001-8512-0113
Claire PerryStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305.ORCID 0000-0002-9324-0518
Clara Sava-SegalStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305.ORCID 0000-0002-3010-3858
Michael ZeinehDepartment of Radiology, Stanford University, Stanford, CA 94305.ORCID 0000-0002-6940-9096
Eric Klaas van StaalduinenDepartment of Radiology, Stanford University, Stanford, CA 94305.ORCID 0000-0001-9786-2712
Jaimie M HendersonDepartment of Neurosurgery, Stanford University, Stanford, CA 94305.ORCID 0000-0002-3276-2267
Matthew MarkertStanford Human Intracranial Cognitive Electrophysiology Program, Stanford University, Stanford, CA 94305.
Stanford University · US

Funding

CAUSAL MECHANISMS OF DISTRIBUTED BRAIN NETWORK FUNCTION DURING EPISODIC MEMORY RETRIEVALR00MH117226 · NIMH · NORTHWESTERN UNIVERSITY AT CHICAGO · PI BRAGA, RODRIGO M · 2020 to 2022
$744k
Experimental Study of Goal-Directed Behavior and Memory During Temporal Lobe Epileptic ActivityR21NS113024 · NINDS · STANFORD UNIVERSITY · PI PARVIZI, JOSEF · 2021 to 2022
$433k
Causal mechanisms of distributed brain network function during episodic memory retrievalK99MH117226 · NIMH · STANFORD UNIVERSITY · PI BRAGA, RODRIGO M · 2018 to 2019
$254k
NIMH NIH HHS K99 MH117226NIMH NIH HHS R00 MH117226NINDS NIH HHS R21 NS113024
6 · The paper itself

Abstract

The posteromedial cortex (PMC) is known to be a core node of the default mode network. Given its anatomical location and blood supply pattern, the effects of targeted disruption of this part of the brain are largely unknown. Here, we report a rare case of a patient (S19_137) with confirmed seizures originating within the PMC. Intracranial recordings confirmed the onset of seizures in the right dorsal posterior cingulate cortex, adjacent to the marginal sulcus, likely corresponding to Brodmann area 31. Upon the onset of seizures, the patient reported a reproducible sense of self-dissociation-a condition he described as a distorted awareness of the position of his body in space and feeling as if he had temporarily become an outside observer to his own thoughts, his "me" having become a separate entity that was listening to different parts of his brain speak to each other. Importantly, 50-Hz electrical stimulation of the seizure zone and a homotopical region within the contralateral PMC induced a subjectively similar state, reproducibly. We supplement our clinical findings with the definition of the patient's network anatomy at sites of interest using cortico-cortical-evoked potentials, experimental and resting-state electrophysiological connectivity, and individual-level functional imaging. This rare case of patient S19_137 highlights the potential causal importance of the PMC for integrating self-referential information and provides clues for future mechanistic studies of self-dissociation in neuropsychiatric populations.

Indexed as

AdultAwarenessCerebral CortexElectric StimulationEpilepsyGyrus CinguliHumansMagnetic Resonance ImagingMaleSeizuresYoung AdultBrodmann area 31default mode networkepilepsyposterior cingulateself-dissociation

Identifiers

PMID34272280
PMCPMC8307613
OpenAlexW3182345021

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.