Cited by 325Memory and Neural MechanismsNeural and Behavioral Psychology StudiesMemory Processes and Influences

Contextual fear conditioning in humans: cortical–hippocampal and amygdala contributions

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Alvarez, R. P., Biggs, A., Chen, G., Pine, D. S., Grillon, C.·2008·Journal of Neuroscience

Abstract

Functional imaging studies of cued fear conditioning in humans have mostly confirmed findings in animals, but it is unclear whether the brain mechanisms that underlie contextual fear conditioning in animals are also preserved in humans. We investigated this issue using functional magnetic resonance imaging and virtual reality contexts. Subjects underwent differential context conditioning in which they were repeatedly exposed to two contexts (CXT+ and CXT-) in semirandom order, with contexts counterbalanced across participants. An unsignaled footshock was consistently paired with the CXT+, and no shock was ever delivered in the CXT-. Evidence for context conditioning was established using skin conductance and anxiety ratings. Consistent with animal models centrally implicating the hippocampus and amygdala in a network supporting context conditioning, CXT+ compared with CXT- significantly activated right anterior hippocampus and bilateral amygdala. In addition, context conditioning was associated with activation in posterior orbitofrontal cortex, medial dorsal thalamus, anterior insula, subgenual anterior cingulate, and parahippocampal, inferior frontal, and parietal cortices. Structural equation modeling was used to assess interactions among the core brain regions mediating context conditioning. The derived model indicated that medial amygdala was the source of key efferent and afferent connections including input from orbitofrontal cortex. These results provide evidence that similar brain mechanisms may underlie contextual fear conditioning across species.

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Crossref · 10.1523/jneurosci.1246-08.2008

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  • Similarly constructed VR stimuli are effective for studying context manipulations in the MRI environment.

    “Previous research in our laboratory has shown that similarly constructed VR stimuli are effective for studying context manipulations in the MRI environment (Alvarez et al., 2008).”

    From Phasic and sustained fear in humans elicits distinct patterns of brain activity (2011) · cites this paper as Alvarez et al., 2008

  • Transient activation in ventral amygdala/anterior hippocampus to unpredictable threat context onset provides further evidence that the amygdala and hippocampus play time-limited roles during sustained aversive contexts.

    “Transient activation in ventral amygdala/anterior hippocampus to unpredictable threat context onset provides further evidence that the amygdala (Alvarez et al., 2008; Davis et al., 2010b) and hippocampus (Marschner et al., 2008) play time-limited roles during sustained aversive contexts.”

    From Phasic and sustained fear in humans elicits distinct patterns of brain activity (2011) · cites this paper as Alvarez et al., 2008

  • Previous neuroimaging findings indicate that contextual fear conditioning elicits sustained activity in anterior insula.

    “Previous neuroimaging findings indicating that contextual fear conditioning elicits sustained activity in anterior insula are consistent with this interpretation (Alvarez et al., 2008).”

    From Phasic and sustained fear in humans elicits distinct patterns of brain activity (2011) · cites this paper as Alvarez et al., 2008

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Authors
Alvarez, R. P., Biggs, A., Chen, G., Pine, D. S., & Grillon, C.
Affiliations
National Institutes of Health (US)
Venue
Journal of Neuroscience
Published
2008-06-11
Volume
28
Issue
24
Pages
6211-6219
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1990137058
Cited by
325
References
70
Citations by year
2026: 8 · 2025: 10 · 2024: 23 · 2023: 10 · 2022: 13 · 2021: 12 · 2020: 13 · 2019: 22 · 2018: 23 · 2017: 16 · 2016: 22 · 2015: 25 · 2014: 22 · 2013: 29 · 2012: 26
FWCI
8.78
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (Z99 MH999999)
  • National Institute of Mental Health
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
Keywords
contextual fear conditioning, hippocampus, amygdala, medial amygdala, orbitofrontal cortex, virtual reality, anterior cingulate cortex, thalamus, parahippocampal cortex, footshock
MeSH terms
Adult, Amygdala, Cerebral Cortex, Conditioning, Psychological, Fear, Female, Galvanic Skin Response, Hippocampus, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Models, Biological, Neural Pathways, Oxygen, Psychophysics, Time Factors

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