Cited by 137Neural dynamics and brain functionNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

An in vivo assay of synaptic function mediating human cognition

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Moran, Rosalyn J., Symmonds, Mkael, Stephan, Klaas E., Friston, Karl J., Dolan, Raymond J.·2011·Current Biology

Abstract

The contribution of dopamine to working memory has been studied extensively [1-3]. Here, we exploited its well characterized effects [1-3] to validate a novel human in vivo assay of ongoing synaptic [4, 5] processing. We obtained magnetoencephalographic (MEG) measurements from subjects performing a working memory (WM) task during a within-subject, placebo-controlled, pharmacological (dopaminergic) challenge. By applying dynamic causal modeling (DCM), a Bayesian technique for neuronal system identification [6], to MEG signals from prefrontal cortex, we demonstrate that it is possible to infer synaptic signaling by specific ion channels in behaving humans. Dopamine-induced enhancement of WM performance was accompanied by significant changes in MEG signal power, and a DCM assay disclosed related changes in synaptic signaling. By estimating the contribution of ionotropic receptors (AMPA, NMDA, and GABA(A)) to the observed spectral response, we demonstrate changes in their function commensurate with the synaptic effects of dopamine. The validity of our model is reinforced by a striking quantitative effect on NMDA and AMPA receptor signaling that predicted behavioral improvement over subjects. Our results provide a proof-of-principle demonstration of a novel framework for inferring, noninvasively, neuromodulatory influences on ion channel signaling via specific ionotropic receptors, providing a window on the hidden synaptic events mediating discrete psychological processes in humans.

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Crossref · 10.1016/j.cub.2011.06.053

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  • Validation studies in humans and animals show that DCM for EEG can capture short-term changes in synaptic efficacy, such as neuromodulation of glutamatergic receptor conductances, and distinguish different types of synaptic plasticity in cortical microcircuits.

    “Validation studies in humans and animals have shown that DCM for EEG is capable of capturing short-term changes in synaptic efficacy, such as neuromodulation of glutamatergic receptor conductances, and distinguish different types of synaptic plasticity in cortical microcircuits (66, 132, 138–140)”
  • Boosting dopaminergic function enhances psychological and electrophysiological signatures of maintenance processes.

    “while boosting dopaminergic function enhances psychological and electrophysiological signatures of such maintenance processes (Moran et al., 2011).”

    From Goals and Habits in the Brain (2013) · cites this paper as Moran et al., 2011

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Authors
Moran, R. J., Symmonds, M., Stephan, K. E., Friston, K. J., & Dolan, R. J.
Affiliations
Wellcome Centre for Human Neuroimaging (GB)
Corresponding author
Moran, Rosalyn J.
Venue
Current Biology
Publisher
Elsevier BV
Published
2011-08
Volume
21
Issue
15
Pages
1320-1325
ISSN
0960-9822 (ISSN-L)
OpenAlex
W2099907163
Cited by
137
References
46
Citations by year
2026: 1 · 2025: 5 · 2024: 5 · 2023: 4 · 2022: 7 · 2021: 9 · 2020: 9 · 2019: 8 · 2018: 5 · 2017: 9 · 2016: 15 · 2015: 17 · 2014: 17 · 2013: 17 · 2012: 6
FWCI
6.82
Type
journal article
Language
en
Open access
Locations
  • Current Biology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (publishedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
  • UCL Discovery (University College London) (submittedVersion)
  • Max Planck Digital Library (submittedVersion, other-oa)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • Explore Bristol Research (submittedVersion)
  • Bristol Research (University of Bristol) (submittedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
Wellcome Trust (088130)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
dopamine, working memory, synaptic signaling, ligand-gated ion channels, AMPA receptors, NMDA receptor, GABAA receptor, prefrontal cortex, dynamic causal modeling, magnetoencephalography, pharmacological challenge, neuromodulation
MeSH terms
Cognition, Dopamine, Humans, Memory, Synapses, Signal Transduction

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