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Hippocampus mediates conceptual generalization of pain modulation
Arxiv
|March 30, 2026
Summary
Expectations shape pain perception. Novel stimuli conceptually linked to pain cues generalize pain, mediated by brain regions like the hippocampus, influencing pain processing.
Area of Science:
- Neuroscience
- Psychology
- Pain Research
Background:
- Pain perception is influenced by learning and expectations.
- Generalization of learned pain associations to related cues is not fully understood.
- Neurobiological mechanisms underlying conceptual generalization of pain remain unclear.
Purpose of the Study:
- To investigate how conceptual generalization of learned pain associations influences pain experience.
- To explore the neurobiological substrates of conceptual generalization in pain modulation.
- To understand the role of expectation and brain networks in generalized pain.
Main Methods:
- Functional magnetic resonance imaging (fMRI) and multilevel mediation analyses.
- Human participants learned cue-pain associations (high/low heat pain).
- Tested generalization using novel cues from related conceptual categories.
Main Results:
- Participants reported increased pain for stimuli conceptually related to high-pain cues, demonstrating generalization.
- Hippocampal activity mediated the relationship between expectations and generalized pain.
- Default mode network and striatum contributed to conceptual generalization; amygdala responded but did not mediate pain effects.
Conclusions:
- Conceptual processes significantly influence pain modulation through generalization.
- Expectancy-driven pain modulation involves specific neural networks, including the hippocampus.
- Findings offer insights into placebo effects and chronic pain mechanisms.
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