Neural correlates of emotional memory enhancement: The role of valence and arousal.

Overview

1. Division of Cognitive Neuroscience, Department of Biomedicine, University of Basel, Basel, Switzerland
2. Research Cluster Molecular and Cognitive Neurosciences, Department of Biomedicine, University of Basel, Basel, Switzerland
3. Psychiatric University Clinics, University of Basel, Basel, Switzerland
4. Division of Molecular Neuroscience, Department of Biomedicine, University of Basel, Basel, Switzerland

Abstract

Emotional events are remembered better than neutral ones. While many human neuroimaging studies have identified brain regions involved, relatively few—and typically small—studies have disentangled how arousal and valence shape the neural substrates of this enhancement. We leveraged a large single-centre fMRI sample (n = 1,006) in which healthy young adults viewed negative, neutral, and positive pictures during scanning followed by an unannounced free-recall test. Using whole-brain subsequent-memory analyses (PFWE < 0.05), we contrasted successful encoding of emotional (negative + positive) vs neutral items, then tested valence-specific effects (successful encoding: negative > neutral; positive > neutral), and finally controlled for subjective arousal via serial parametric modulation. Behaviourally, recall was higher for emotional than for neutral pictures. Consistent with prior meta-analytic evidence, emotional > neutral successful encoding engaged occipito-temporal visual cortex, anterior cingulate, insula, and amygdala. Additionally, we observed an extensive temporoparietal network, while hippocampal/parahippocampal activations were absent. After controlling for arousal, amygdala and insula effects were no longer significant, indicating these regions were sensitive to arousal rather than valence. Overlap of negative- and positive-valence enhancement localised primarily to the occipito-temporal cortex. Negative-specific enhancement recruited the lateral occipital/fusiform and bilateral supramarginal regions; positive-specific enhancement involved the rostral/caudal anterior cingulate, superior frontal, and parietal cortex, as well as the precuneus. Successful neutral encoding preferentially engaged frontoparietal control regions and bilateral lingual/parahippocampal cortex. Together, these findings dissociate valence-dependent from arousal-dependent mechanisms and reveal both partially overlapping and distinct networks for negative and positive memory enhancement, refining neurocognitive models of emotional memory encoding.

Reproduced under the paper's license (CC BY), from the paper cited above.

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Data

Datasets cited

• neurovault.org/collections/joavvsyp, at neurovault.org; found in “Data and Code Availability”

Data and Code Availability

Participant-level data and analysis code are hosted in controlled-access repositories at the University of Basel and will be shared upon reasonable request to the corresponding author, subject to a data-sharing agreement and institutional approval. Any shared datasets will be de-identified in line with applicable regulations. The group-level results of the current study, including neuroimaging nifti files, can be accessed through the Neurovault repository (https://neurovault.org/collections/JOAVVSYP/).

Reproduced under the paper's license (CC BY), from the paper cited above.

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Version 1, 29 September 2026: the first record

Recorded: type, language, journal, volume, pages, dates, 4 authors, 6 keywords, 77 references.

Cite

This paper

Amini, E., Coynel, D., Papassotiropoulos, A., & de Quervain, D. J.-F. (2026). Neural correlates of emotional memory enhancement: The role of valence and arousal. Imaging neuroscience (Cambridge, Mass.), 4, IMAG.a.1213. https://doi.org/10.1162/imag.a.1213

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