Fronto-striatal activity predicts anhedonia and positive empathy subtypes
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The dorsolateral prefrontal cortex, globus pallidus, and nucleus accumbens are important components of the reward circuit in the brain; and prior research suggests individuals with damage to these regions feel less pleasure (i.e., are anhedonic). However, little is known about how these brain regions relate to vicarious pleasure. Pilot fMRI data were collected from 20 participants (Mage = 22, SD = 7.0, 63% female) during a validated empathy induction paradigm that utilized video clips extracted from the television show “Extreme Makeover: Home Edition” to elicit empathic happiness (i.e. vicarious happiness) when targets display positive affect, and either empathic cheerfulness (i.e. the tendency to want to cheer someone up) or empathic concern (i.e. vicarious sadness) when targets display negative affect. Participants also completed the novel “Happy Faces” task—a behavioral measure of anhedonia—while fMRI was collected. fMRI data during task completion were used to predict trait empathy measured via self-report outside of the scanner, and accuracy on the “Happy Faces” task. Results indicate that globus pallidus activity during empathic concern-eliciting video clips significantly predicted self-reported trait empathic cheerfulness (R2 = 26%, p = 0.045). Furthermore, greater dorsolateral prefrontal cortex (DLPFC) activity during the Happy Faces task predicted accurate performance on the task (R2 = 34%, p < .05); and greater nucleus accumbens shell activity during the Happy Faces task predicted greater trait empathic happiness (R2 = 38%, p < .05). These results suggest that fronto-striatal circuitry contributes to our experience of anhedonia, empathic happiness, and empathic cheerfulness.
KeywordsfMRI Positive empathy Anhedonia
This study was funded by a 2015–2016 Seed grant from the Joint Georgia State University/Georgia Tech Center for Advanced Brain Imaging (CABI).
Compliance with ethical standards
Conflict of interest
Grazia Mirabito declares that she has no conflict of interest. Zinat Taiwo declares that she has no conflict of interest. Dr. Matt Bezdek declares that he has no conflict of interest. Dr. Sharee N. Light declares that she has no conflict of interest.
All procedures performed were in accordance with the ethical standards of the Center for Advanced Brain Imaging Institutional Review Board (IRB) and with the 1964 Helsinki declaration and its later amendments. Informed consent was obtained from all individual participants included in the study.
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