Cited by 193Memory and Neural MechanismsPrimate Behavior and EcologyAction Observation and Synchronization

Experience modulates vicarious freezing in rats: a model for empathy

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Atsak, Piray, Orre, Marie, Bakker, Petra, Cerliani, Leonardo, Roozendaal, Benno, Gazzola, Valeria, Moita, Marta, Keysers, Christian·2011·PLoS ONE

Abstract

The study of the neural basis of emotional empathy has received a surge of interest in recent years but mostly employing human neuroimaging. A simpler animal model would pave the way for systematic single cell recordings and invasive manipulations of the brain regions implicated in empathy. Recent evidence has been put forward for the existence of empathy in rodents. In this study, we describe a potential model of empathy in female rats, in which we studied interactions between two rats: a witness observes a demonstrator experiencing a series of footshocks. By comparing the reaction of witnesses with or without previous footshock experience, we examine the role of prior experience as a modulator of empathy. We show that witnesses having previously experienced footshocks, but not naïve ones, display vicarious freezing behavior upon witnessing a cage-mate experiencing footshocks. Strikingly, the demonstrator's behavior was in turn modulated by the behavior of the witness: demonstrators froze more following footshocks if their witness froze more. Previous experiments have shown that rats emit ultrasonic vocalizations (USVs) when receiving footshocks. Thus, the role of USV in triggering vicarious freezing in our paradigm is examined. We found that experienced witness-demonstrator pairs emitted more USVs than naïve witness-demonstrator pairs, but the number of USVs was correlated with freezing in demonstrators, not in witnesses. Furthermore, playing back the USVs, recorded from witness-demonstrator pairs during the empathy test, did not induce vicarious freezing behavior in experienced witnesses. Thus, our findings confirm that vicarious freezing can be triggered in rats, and moreover it can be modulated by prior experience. Additionally, our result suggests that vicarious freezing is not triggered by USVs per se and it influences back onto the behavior of the demonstrator that had elicited the vicarious freezing in witnesses, introducing a paradigm to study empathy as a social loop.

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  • In rats and mice, emotional contagion of others' distress brought about by foot shocks increased if the rats and mice had experienced foot shocks in the past.

    “In rats and mice, the emotional contagion of others' distress brought about by foot shocks increased if the rats and mice had experienced the foot shocks in the past (Atsak et al., 2011; Sanders et al., 2013).”
  • In the imminent threat paradigm, observers respond to the demonstrators' fear with freezing and decreased heart rate, both indicating high fear levels.

    “It has been shown that in the imminent threat paradigm the observers respond to the demonstrators' fear with freezing 152,158 and decreased heart rate, 159 both of which indicate high fear levels.”
  • Vicarious freezing is significantly enhanced by prior experience with footshock.

    “Comparing the reaction of witnesses with or without previous footshock experience, it has been shown that vicarious freezing is significantly enhanced by prior experience.158”

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  1. [57]Langford D 2006 Social modulation of pain as evidence for empathy in mice. Science 312 1967 1970 16809545

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Authors
Atsak, P., Orre, M., Bakker, P., Cerliani, L., Roozendaal, B., Gazzola, V., Moita, M., & Keysers, C.
Affiliations
  • University Medical Center Groningen (NL)
  • Netherlands Institute for Neuroscience (NL)
  • Instituto Gulbenkian de Ciência (PT)
Corresponding author
Keysers, Christian
Venue
PLoS ONE
Published
2011-07-13
Volume
6
Issue
7
Pages
e21855
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2050986015
Cited by
193
References
80
Citations by year
2026: 10 · 2025: 5 · 2024: 18 · 2023: 9 · 2022: 13 · 2021: 17 · 2020: 25 · 2019: 19 · 2018: 26 · 2017: 9 · 2016: 19 · 2015: 14 · 2014: 4 · 2013: 4 · 2012: 1
FWCI
1.46
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • KNAW Research Portal (The Royal Netherlands Academy of Arts and Sciences) (publishedVersion, other-oa)
  • KNAW research portal (Royal Academy of Art and Sciences (KNAW)) (acceptedVersion, other-oa)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (acceptedVersion, cc-by)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, cc-by)
Funders
  • Ministry of Education, Culture, Sports, Science and Technology
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (452-04-305)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
  • Social Sciences › Psychology › Social Psychology › Action Observation and Synchronization
Keywords
empathy, affective empathy, rats, ultrasonic vocalizations, social behavior
MeSH terms
Animals, Behavior, Animal, Empathy, Fear, Female, Freezing, Humans, Models, Psychological, Social Behavior, Sound Spectrography, Rats, Long-Evans, Rats

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