Cited by 94Transcranial Magnetic Stimulation StudiesVisual perception and processing mechanismsNeural dynamics and brain function

Cortical excitability controls the strength of mental imagery

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Keogh, Rebecca, Bergmann, Johanna, Pearson, Joel·2020·eLife

Published version of a preprint

Abstract

Mental imagery provides an essential simulation tool for remembering the past and planning the future, with its strength affecting both cognition and mental health. Research suggests that neural activity spanning prefrontal, parietal, temporal, and visual areas supports the generation of mental images. Exactly how this network controls the strength of visual imagery remains unknown. Here, brain imaging and transcranial magnetic phosphene data show that lower resting activity and excitability levels in early visual cortex (V1-V3) predict stronger sensory imagery. Further, electrically decreasing visual cortex excitability using tDCS increases imagery strength, demonstrating a causative role of visual cortex excitability in controlling visual imagery. Together, these data suggest a neurophysiological mechanism of cortical excitability involved in controlling the strength of mental images.

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  • Lower levels of resting activity and excitability in early visual cortex predict stronger imagery.

    “Lower levels of resting activity and excitability in early visual cortex have also been shown to predict stronger imagery [93”

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  1. Hashemi RH Bradley WG Lisantu CJ 2010 MRI: The Basics Lippincott Williams & Wilkins

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Authors
Keogh, R., Bergmann, J., & Pearson, J.
Affiliations
  • UNSW Sydney (AU)
  • Goethe University Frankfurt (DE)
Corresponding author
Keogh, Rebecca
Venue
eLife
Published
2020-05-05
Volume
9
ISSN
2050-084X (ISSN-L)
OpenAlex
W3022218802
Cited by
94
References
117
Citations by year
2026: 10 · 2025: 10 · 2024: 28 · 2023: 13 · 2022: 6 · 2021: 13 · 2020: 8 · 2019: 1 · 2018: 1 · 2017: 3 · 2015: 1
FWCI
3.87
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Publication Server of Goethe University Frankfurt am Main (Goethe University Frankfurt) (submittedVersion, cc-by-nc-nd)
  • Publication Server of Goethe University Frankfurt am Main (Goethe University Frankfurt) (submittedVersion, cc-by)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Funders
  • National Health and Medical Research Council (APP1024800, APP1046198, APP1085404, APP1049596)
  • Australian Research Council (DP140101560, DP160103299)
  • University of New South Wales (International Postgraduate Research Scholarship, Brain Sciences UNSW PhD Top Up Scholarship)
  • Australian Federal Government (Australian Postgraduate Award)
Topics
  • Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
mental imagery, cortical excitability, early visual cortex, resting-state brain activity, transcranial magnetic stimulation, transcranial direct current stimulation, visual cortex
MeSH terms
Cortical Excitability, Adolescent, Adult, Cerebral Cortex, Female, Frontal Lobe, Humans, Imagination, Magnetic Resonance Imaging, Male, Visual Cortex, Prefrontal Cortex, Young Adult, Functional Neuroimaging, Transcranial Direct Current Stimulation

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