Cited by 172Functional Brain Connectivity StudiesAdvanced Neuroimaging Techniques and ApplicationsNeural dynamics and brain function

The Rhesus Monkey connectome predicts disrupted functional networks resulting from pharmacogenetic inactivation of the Amygdala

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Grayson, David S., Bliss-Moreau, Eliza, Machado, Christopher J., Bennett, Jeffrey, Shen, Kelly, Grant, Kathleen A., Fair, Damien A., Amaral, David G.·2016·Neuron

Abstract

Contemporary research suggests that the mammalian brain is a complex system, implying that damage to even a single functional area could have widespread consequences across the system. To test this hypothesis, we pharmacogenetically inactivated the rhesus monkey amygdala, a subcortical region with distributed and well-defined cortical connectivity. We then examined the impact of that perturbation on global network organization using resting-state functional connectivity MRI. Amygdala inactivation disrupted amygdalocortical communication and distributed corticocortical coupling across multiple functional brain systems. Altered coupling was explained using a graph-based analysis of experimentally established structural connectivity to simulate disconnection of the amygdala. Communication capacity via monosynaptic and polysynaptic pathways, in aggregate, largely accounted for the correlational structure of endogenous brain activity and many of the non-local changes that resulted from amygdala inactivation. These results highlight the structural basis of distributed neural activity and suggest a strategy for linking focal neuropathology to remote neurophysiological changes.

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Crossref · 10.1016/j.neuron.2016.06.005

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  • Experimentally induced local perturbations produce broad neurophysiological changes that can be partly accounted for by global network interactions.

    “recent studies have found that even purely local, experimentally induced perturbations (e.g. exogenous stimulation or inactivation) result in widespread, complex neurophysiological changes, which are at least partly explainable as local interactions with global network structure (Andoh et al., 2015; Grayson et al., 2016; Gu et al., 2015a; Misic et al., 2015).”
  • A node's structural hub status has been associated with global integration of brain activity.

    “Similarly, structural hubness has been linked to integration of global brain activity (Grayson et al., 2016).”
  • Focal pharmacogenetic inactivation and cortical transcranial magnetic stimulation demonstrate a causal effect on distributed resting-state connectivity and other neurophysiological signatures, driven by cascading neuronal interactions.

    “In our recent paper, we presented experimental validation of these ideas through focal pharmacogenetic inactivation (Grayson et al., 2016), and similar findings were presented by (Andoh et al., 2015) using cortical transcranial magnetic stimulation. Both works demonstrate a causal effect on distributed resting-state connectivity and other neurophysiological signatures, driven by cascading neuronal”
  • Site-specific pathology can be deduced from distributed functional network disturbances.

    “This work also provides evidence that site-specific pathology can be deduced from distributed functional network disturbances (Grayson et al., 2016).”
  • Even the best-performing SC-FC models generally account for less than 50% of the variance in FC across the brain in both humans and non-human primates.

    “Even the best-performing SC-FC models generally account for less than 50% of the variance in FC across the brain in both humans and non-human primates (Grayson et al., 2016; Messe et al., 2014; Misic et al., 2015).”

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Authors
Grayson, D. S., Bliss-Moreau, E., Machado, C. J., Bennett, J., Shen, K., Grant, K. A., Fair, D. A., & Amaral, D. G.
Affiliations
  • University of California, Davis (US)
  • Rotman Research Institute (CA)
  • Oregon National Primate Research Center (US)
  • Oregon Health & Science University (US)
Corresponding author
Amaral, David G.
Venue
Neuron
Publisher
Elsevier BV
Published
2016-07
Volume
91
Issue
2
Pages
453-466
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2501822306
Cited by
172
References
46
Citations by year
2026: 1 · 2025: 15 · 2024: 13 · 2023: 27 · 2022: 12 · 2021: 15 · 2020: 21 · 2019: 24 · 2018: 19 · 2017: 24 · 2016: 1
FWCI
14.42
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (UL1TR000128, AA109431, OD-011107, P51OD011107)
  • National Institute on Alcohol Abuse and Alcoholism (U01AA013510, R24AA019431)
  • National Institute of Mental Health (R21MH098585, R01MH096773)
  • National Center for Advancing Translational Sciences
  • California National Primate Research Center (OD 011107)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
amygdala, rhesus monkeys, brain connectome, resting-state functional connectivity, graph theory, structural connectivity
MeSH terms
Amygdala, Animals, Macaca mulatta, Magnetic Resonance Imaging, Male, Models, Neurological, Nerve Net, Neural Pathways, Pharmacogenetics, Connectome

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