Evidence map›Paper›PMID 28978234›Full record

ArticleBrain connectivity2017

The Hippocampus and Amygdala Are Integrators of Neocortical Influence: A CorticoCortical Evoked Potential Study.

Pierre Mégevand, David M Groppe, Stephan Bickel, Manuel R Mercier, Matthew S Goldfinger, Corey J Keller, László Entz, Ashesh D Mehta

Open access · greenAbstract read
In one paragraph

Article in Brain connectivity, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 2 pooled it
1.4field-weighted citation impact, top 18% 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

22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 41 citations in OpenAlex.

  1. Semiology of seizures with temporo-polar or "medio-lateral" temporal origin: A systematic review.Epileptic disorders : international epilepsy journal with videotape · 2025
    Pooled it
  2. Pooled it
  3. Trial
  4. Review
  5. Article
  6. Macroscale Traveling Waves Evoked by Single-Pulse Stimulation of the Human Brain.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  7. Coupling of Sharp Wave Events between Zebrafish Hippocampal and Amygdala Homologs.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Crossmodal Phase Reset and Evoked Responses Provide Complementary Mechanisms for the Influence of Visual Speech in Auditory Cortex.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2020
    Article
  19. Article
  20. Intracortical Dynamics Underlying Repetitive Stimulation Predicts Changes in Network Connectivity.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2019
    Article
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 at 3 institutions in 2 countries.

Pierre Mégevand1 Department of Neurosurgery, Hofstra North Shore LIJ School of Medicine, and Feinstein Institute for Medical Research , Manhasset, New York.
David M Groppe1 Department of Neurosurgery, Hofstra North Shore LIJ School of Medicine, and Feinstein Institute for Medical Research , Manhasset, New York.
Stephan Bickel1 Department of Neurosurgery, Hofstra North Shore LIJ School of Medicine, and Feinstein Institute for Medical Research , Manhasset, New York.
Manuel R Mercier2 Department of Neurology, Montefiore Medical Center , Bronx, New York.
Matthew S Goldfinger1 Department of Neurosurgery, Hofstra North Shore LIJ School of Medicine, and Feinstein Institute for Medical Research , Manhasset, New York.
Corey J Keller1 Department of Neurosurgery, Hofstra North Shore LIJ School of Medicine, and Feinstein Institute for Medical Research , Manhasset, New York.
László Entz4 Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences , Hungarian Academy of Sciences, Budapest, Hungary .
Ashesh D Mehta1 Department of Neurosurgery, Hofstra North Shore LIJ School of Medicine, and Feinstein Institute for Medical Research , Manhasset, New York.
Montefiore Medical Center · USAlbert Einstein College of Medicine · USInstitute of Cognitive Neuroscience and Psychology · HU

Funding

MEDICAL SCIENTIST TRAINING PROGRAMT32GM007288 · NIGMS · YESHIVA UNIVERSITY · PI AKABAS, MYLES H. · 1985 to 2022
$35.6M
NIGMS NIH HHS T32 GM007288
6 · The paper itself

Abstract

Brain stimulation is increasingly viewed as an effective approach to treat neuropsychiatric disease. The brain's organization in distributed networks suggests that the activity of a remote brain structure could be modulated by stimulating cortical areas that strongly connect to the target. Most connections between cerebral areas are asymmetric, and a better understanding of the relative direction of information flow along connections could improve the targeting of stimulation to influence deep brain structures. The hippocampus and amygdala, two deep-situated structures that are crucial to memory and emotions, respectively, have been implicated in multiple neurological and psychiatric disorders. We explored the directed connectivity between the hippocampus and amygdala and the cerebral cortex in patients implanted with intracranial electrodes using corticocortical evoked potentials (CCEPs) evoked by single-pulse electrical stimulation. The hippocampus and amygdala were connected with most of the cortical mantle, either directly or indirectly, with the inferior temporal cortex being most directly connected. Because CCEPs assess the directionality of connections, we could determine that incoming connections from cortex to hippocampus were more direct than outgoing connections from hippocampus to cortex. We found a similar, although smaller, tendency for connections between the amygdala and cortex. Our results support the roles of the hippocampus and amygdala to be integrators of widespread cortical influence. These results can inform the targeting of noninvasive neurostimulation to influence hippocampus and amygdala function.

Indexed as

Brain MappingAdolescentAdultAmygdalaCerebral CortexElectric StimulationElectrodes, ImplantedElectroencephalographyEpilepsyEvoked PotentialsFemaleFunctional LateralityHippocampusHumansMaleMiddle Agedeffective connectivityelectrical brain stimulationevoked potentialsmedial temporal lobeneurostimulation

Identifiers

PMID28978234
PMCPMC5915225
OpenAlexW2760860202

What OpenQuestion holds

Textmetadata
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.